refresh my hash

ESP8266/CMakeLists.txt

@@ -0,0 +1,34 @@
+cmake_minimum_required(VERSION 3.16)
+set(PROJ esp8266)
+
+project(${PROJ} LANGUAGES C)
+
+set(CMAKE_COLOR_MAKEFILE ON)
+
+aux_source_directory(${CMAKE_CURRENT_SOURCE_DIR} SOURCES)
+
+option(DEBUG "Compile in debug mode" OFF)
+
+set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS} -Og -g3 -ggdb -Werror")
+set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS} -O3 -march=native -fdata-sections -ffunction-sections -flto=auto")
+
+if(DEBUG)
+    add_definitions(-DEBUG)
+    set(CMAKE_BUILD_TYPE DEBUG)
+    set(CMAKE_VERBOSE_MAKEFILE "ON")
+else()
+    SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--gc-sections -flto=auto")
+    set(CMAKE_BUILD_TYPE RELEASE)
+endif()
+
+
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(${PROJ} REQUIRED usefull_macros)
+add_executable(esp8266 ${SOURCES})
+target_link_libraries(${PROJ} ${${PROJ}_LIBRARIES} -lm)
+
+include(GNUInstallDirs)
+install(TARGETS ${PROJ}
+#    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+)

ESP8266/Readme

@@ -0,0 +1,2 @@
+Simplest server based on AT-commands using ESP8266.
+I tried to make code as nearest to MCU as possible.

ESP8266/esp8266.c

@@ -0,0 +1,170 @@
+/*
+ * This file is part of the esp8266 project.
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <usefull_macros.h>
+#include <stdio.h>
+
+#include "esp8266.h"
+#include "serial.h"
+
+#define ESPMSG(x)  do{if(!serial_send_msg(x)) return FALSE;}while(0)
+
+// sometimes ESP hangs with message "WIFI GOT IP" and I can do nothing except waiting
+
+const char *msgptr = NULL; // pointer to received message
+static int receivedlen = 0;
+
+// check module working
+int esp_check(){
+    // try simplest check for three times
+    for(int i = 0; i < 3; ++i) if( ANS_OK == serial_sendwans("AT")) break;
+    //esp_close();
+    // now try next even if no answer for "AT"
+    if( ANS_OK == serial_sendwans("ATE0") // echo off
+        && ANS_OK == serial_sendwans("AT+CWMODE_CUR=1") // station mode
+        ) return TRUE;
+    return FALSE;
+}
+
+// check established wifi connection
+esp_cipstatus_t esp_cipstatus(){
+    if(ANS_OK != serial_sendwans("AT+CIPSTATUS")) return ESP_CIP_FAILED;
+    char *l = serial_getline(NULL, NULL);
+    const char *n = NULL;
+    if(!l || !(n = serial_tidx(l, "STATUS:"))) return ESP_CIP_FAILED;
+    return (esp_cipstatus_t)serial_s2i(n);
+}
+
+// connect to AP
+int esp_connect(const char *SSID, const char *pass){
+    ESPMSG("AT+CWJAP_CUR=\"");
+    ESPMSG(SSID);
+    ESPMSG("\",\"");
+    ESPMSG(pass);
+    if(ANS_OK != serial_sendwans("\"")) return FALSE;
+    return TRUE;
+}
+
+// just send AT+CIFSR
+int esp_myip(){
+    return (ANS_OK == serial_sendwans("AT+CIFSR"));
+}
+
+// start server on given port
+int esp_start_server(const char *port){
+    if(ANS_OK != serial_sendwans("AT+CIPMUX=1")){ // can't start server without mux
+        // what if already ready?
+        char *x = serial_getline(NULL, NULL);
+        if(!x || !serial_tidx(x, "link is builded")) return FALSE;
+    }
+    ESPMSG("AT+CIPSERVER=1,");
+    if(ANS_OK != serial_sendwans(port)) return FALSE;
+    return TRUE;
+}
+
+// stop server
+int ep_stop_server(){
+    return (ANS_OK == serial_sendwans("AT+CIPSERVER=0"));
+}
+
+// next (or only) line of received data
+const char *esp_msgline(){
+    DBG("receivedlen=%d", receivedlen);
+    if(msgptr){
+        const char *p = msgptr;
+        msgptr = NULL;
+        return p;
+    }
+    if(receivedlen < 1) return NULL;
+    int l, d;
+    const char *got = serial_getline(&l, &d);
+    receivedlen -= l + d;
+    return got;
+}
+
+// process connection/disconnection/messages
+// fd - file descriptor of opened/closed connections
+esp_clientstat_t esp_process(int *fd){
+    msgptr = NULL;
+    receivedlen = 0;
+    int l, d;
+    char *got = serial_getline(&l, &d);
+    if(!got) return ESP_CLT_IDLE;
+    const char *x = serial_tidx(got, "+IPD,");
+    if(x){
+        if(fd) *fd = serial_s2i(x);
+        x = serial_tidx(x, ",");
+        if(!x) return ESP_CLT_ERROR;
+        int r = serial_s2i(x);
+        x = serial_tidx(x, ":");
+        if(!x) return ESP_CLT_ERROR;
+        receivedlen = r - d - (l - (x-got)); // this is a rest of data (if any)
+        msgptr = x;
+        return ESP_CLT_GETMESSAGE;
+    }
+    // check for CONNECT/CLOSE
+    if((x = serial_tidx(got, ",CONNECT"))){
+        if(fd) *fd = serial_s2i(got);
+        return ESP_CLT_CONNECTED;
+    }
+    if((x = serial_tidx(got, ",CLOSED"))){
+        if(fd) *fd = serial_s2i(got);
+        return ESP_CLT_DISCONNECTED;
+    }
+    DBG("Unknown message: '%s'", got);
+    return ESP_CLT_IDLE;
+}
+
+int esp_send(int fd, const char *msg){
+    DBG("send '%s' to %d", msg, fd);
+    ESPMSG("AT+CIPSENDEX=");
+    if(!serial_putchar('0' + fd)) return FALSE;
+    if(ANS_OK != serial_sendwans(",2048")) return FALSE;
+    int got = 0;
+    // try several times
+    for(int i = 0; i < 10; ++i){
+        got = serial_getch();
+        if(got == '>') break;
+    }
+    if(got != '>'){
+        DBG("Didn't found '>'");
+        serial_send_msg("\\0"); // terminate message
+        serial_clr();
+        return FALSE; // go into terminal mode
+    }
+    serial_clr(); // remove space after '>'
+    ESPMSG(msg);
+    if(ANS_OK == serial_sendwans("\\0")) return TRUE;
+    DBG("Didn't sent");
+    return FALSE;
+}
+
+void esp_reset(){
+    serial_sendwans("AT+RST");
+}
+
+void esp_close(){
+    serial_sendwans("AT+CIPMUX=0");
+    serial_sendwans("AT+CIPCLOSE");
+}
+
+
+int esp_listAP(){
+    if(ANS_OK == serial_sendwans("AT+CWLAP")) return TRUE;
+    return FALSE;
+}

ESP8266/esp8266.h

@@ -0,0 +1,53 @@
+/*
+ * This file is part of the esp8266 project.
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+// really only 5 clients allowed
+#define ESP_MAX_CLT_NUMBER  8
+
+typedef enum{
+    ESP_CIP_0,
+    ESP_CIP_1,
+    ESP_CIP_GOTIP,
+    ESP_CIP_CONNECTED,
+    ESP_CIP_DISCONNECTED,
+    ESP_CIP_FAILED
+} esp_cipstatus_t;
+
+typedef enum{
+    ESP_CLT_IDLE,           // nothing happened
+    ESP_CLT_CONNECTED,      // new client connected
+    ESP_CLT_DISCONNECTED,   // disconnected
+    ESP_CLT_ERROR,          // error writing or other
+    ESP_CLT_GETMESSAGE,     // receive message from client
+    ESP_CLT_OK,             // sent OK
+} esp_clientstat_t;
+
+int esp_check();
+void esp_close();
+void esp_reset();
+esp_cipstatus_t esp_cipstatus();
+int esp_connect(const char *SSID, const char *pass);
+int esp_myip();
+int esp_start_server(const char *port);
+int ep_stop_server();
+esp_clientstat_t esp_process(int *fd);
+int esp_send(int fd, const char *msg);
+const char *esp_msgline();
+int esp_listAP();

ESP8266/main.c

@@ -0,0 +1,182 @@
+/*
+ * This file is part of the esp8266 project.
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <usefull_macros.h>
+
+#include "esp8266.h"
+#include "serial.h"
+
+static struct{
+    int help;
+    char *serialdev;
+    char *SSID;
+    char *SSpass;
+    int speed;
+    char *port;
+    int reset;
+    int list;
+} G = {
+    .speed = 115200,
+    .serialdev = "/dev/ttyUSB0",
+    .port = "1111",
+};
+
+static sl_option_t options[] = {
+    {"help",    NO_ARGS,    NULL,   'h',    arg_int,    APTR(&G.help),      "show this help"},
+    {"device",  NEED_ARG,   NULL,   'd',    arg_string, APTR(&G.serialdev), "serial device path (default: /dev/ttyUSB0)"},
+    {"baudrate",NEED_ARG,   NULL,   'b',    arg_int,    APTR(&G.speed),     "serial speed"},
+    {"ssid",    NEED_ARG,   NULL,   0,      arg_string, APTR(&G.SSID),      "SSID to connect"},
+    {"pass",    NEED_ARG,   NULL,   0,      arg_string, APTR(&G.SSpass),    "SSID password"},
+    {"port",    NEED_ARG,   NULL,   'p',    arg_string, APTR(&G.port),      "servr port (default: 1111)"},
+    {"reset",   NO_ARGS,    NULL,   0,      arg_int,    APTR(&G.reset),     "reset ESP"},
+    {"list",    NO_ARGS,    NULL,   'l',    arg_int,    APTR(&G.list),      "list available APs"},
+    end_option
+};
+
+void signals(int signo){
+    esp_close();
+    serial_close();
+    exit(signo);
+}
+
+static esp_clientstat_t parse_message(int fd){
+    // this isn't a good idea to send data while not received all; so we use buffer
+    static sl_ringbuffer_t *rb = NULL;
+    if(!rb) rb = sl_RB_new(4096);
+    const char *msg = NULL;
+    char buf[4096];
+    while((msg = esp_msgline())){
+        printf("Received line from fd %d: %s\n", fd, msg);
+        // do something with this data
+        if(0 == strcmp(msg, "help")){
+            sl_RB_writestr(rb, "Hey, we don't have any help yet, try `time`\n");
+        }else if(0 == strcmp(msg, "time")){
+            snprintf(buf, 64, "TIME=%.3f\n", sl_dtime());
+            sl_RB_writestr(rb, buf);
+        }else{
+            if(*msg){
+                snprintf(buf, 127, "Part of your message: _%s_\n", msg);
+                sl_RB_writestr(rb, buf);
+            }
+        }
+    }
+    size_t L = 4094;
+    char *b = buf;
+    while(sl_RB_readline(rb, b, L) > 0){ // there's a bug in my library! Need to fix (sl_RB_readline returns NOT an amount of bytes)
+        size_t got = strlen(b);
+        L -= ++got;
+        b += got;
+        b[-1] = '\n';
+    }
+    if(L == 4094) return ESP_CLT_OK; // nothing to send
+    return esp_send(fd, buf) ? ESP_CLT_OK : ESP_CLT_ERROR;
+}
+
+static void processing(){
+    uint8_t connected[ESP_MAX_CLT_NUMBER] = {0};
+    esp_clientstat_t oldstat[ESP_MAX_CLT_NUMBER] = {0};
+    double T0 = sl_dtime();
+    int N = -1;
+    void chkerr(){
+        if(oldstat[N] == ESP_CLT_ERROR){
+            DBG("error again -> turn off");
+            connected[N] = 0;
+        }
+    }
+    while(1){
+        esp_clientstat_t s = esp_process(&N);
+        if(N > -1 && N < ESP_MAX_CLT_NUMBER){ // parsing
+            //if(s == ESP_CLT_IDLE){ usleep(1000); continue; }
+            switch(s){
+                case ESP_CLT_CONNECTED:
+                    connected[N] = 1;
+                    green("Connection on fd=%d\n", N);
+                    break;
+                case ESP_CLT_DISCONNECTED:
+                    connected[N] = 0;
+                    green("fd=%d disconnected\n", N);
+                    break;
+                case ESP_CLT_ERROR:
+                    DBG("Error from %d", N);
+                    chkerr();
+                    break;
+                case ESP_CLT_GETMESSAGE:
+                    DBG("%d have message", N);
+                    s = parse_message(N);
+                    if(s == ESP_CLT_ERROR) chkerr();
+                    break;
+                default: break;
+            }
+            oldstat[N] = s;
+        }
+        // and here we can do something for all
+        int R = rand() % 5000;
+        // example of `broadcast` message
+        if(R < 2){
+            DBG("Send 'broadcasting' message");
+            char buf[64];
+            snprintf(buf, 63, "Hello, there's %.2f seconds from start\n", sl_dtime() - T0);
+            for(int i = 0; i < ESP_MAX_CLT_NUMBER; ++i){
+                if(!connected[i]) continue;
+                if(ESP_CLT_ERROR == esp_send(i, buf)) chkerr();
+            }
+        }
+        usleep(1000);
+    }
+}
+
+int main(int argc, char **argv){
+    sl_init();
+    sl_parseargs(&argc, &argv, options);
+    if(G.help) sl_showhelp(-1, options);
+    if(!serial_init(G.serialdev, G.speed)) ERRX("Can't open %s at speed %d", G.serialdev, G.speed);
+    if(G.reset){
+        red("Resetting, please wait!\n");
+        esp_reset();
+        usleep(500000);
+        DBG("Get buff");
+        char *str;
+        while((str = serial_getline(NULL, NULL))) if(*str) printf("\t%s\n", str);
+        signals(0);
+    }
+    if(!esp_check()) ERRX("No answer from ESP");
+    if(G.list){
+        if(esp_listAP()){
+            green("Available wifi:\n");
+            char *str;
+            while(str = serial_getline(NULL, NULL)) printf("\t%s\n", str);
+        }else WARNX("Error listing");
+    }
+    esp_cipstatus_t st = esp_cipstatus();
+    if(st != ESP_CIP_GOTIP && st != ESP_CIP_CONNECTED){
+        DBG("Need to connect");
+        if(!esp_connect(G.SSID, G.SSpass)) ERRX("Can't connect");
+    }
+    if(esp_myip()){
+        green("Connected\n");
+        char *str;
+        while(str = serial_getline(NULL, NULL)) if(*str) printf("\t%s\n", str);
+    }
+    ep_stop_server(); // stop just in case
+    if(!esp_start_server(G.port)) ERRX("Can't start server");
+    processing();
+    serial_close();
+    return 0;
+}

ESP8266/serial.c

@@ -0,0 +1,178 @@
+/*
+ * This file is part of the esp8266 project.
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <usefull_macros.h>
+
+#include "serial.h"
+
+// ALL functions here aren't thread-independent, as you can't use the same line simultaneously
+
+static sl_tty_t *device = NULL;
+static double timeout = 30.; // timeout, s
+static sl_ringbuffer_t *rbin = NULL; // input ring buffer
+
+// read all incoming
+void serial_clr(){
+    if(!device) return;
+    while(sl_tty_read(device) > 0);
+}
+
+int serial_init(char *path, int speed){
+    device = sl_tty_new(path, speed, 256);
+    if(!device) return FALSE;
+    device = sl_tty_open(device, 1);
+    if(!device) return FALSE;
+    rbin = sl_RB_new(4096);
+    if(!rbin){
+        sl_tty_close(&device);
+        return FALSE;
+    }
+    sl_tty_tmout(1000); // set select() timeout to 1ms
+    // clear buffer
+    serial_clr();
+    return TRUE;
+}
+
+void serial_close(){
+    if(device) sl_tty_close(&device);
+    if(rbin) sl_RB_delete(&rbin);
+}
+
+int serial_set_timeout(double tms){
+    if(tms < 0.1) return FALSE;
+    timeout = tms;
+    return TRUE;
+}
+
+// send messages over serial,
+// without EOL:
+int serial_send_msg(const char *msg){
+    if(!msg || !device) return FALSE;
+    int l = strlen(msg);
+    DBG("Write message `%s` (%d bytes)", msg, l);
+    if(sl_tty_write(device->comfd, msg, l)) return FALSE;
+    return TRUE;
+}
+// and with:
+int serial_send_cmd(const char *msg){
+    if(!msg || !device) return FALSE;
+    if(!serial_send_msg(msg)) return FALSE;
+    DBG("Write EOL");
+    if(sl_tty_write(device->comfd, "\r\n", 2)) return FALSE;
+    return TRUE;
+}
+int serial_putchar(char ch){
+    if(!device) return FALSE;
+    if(sl_tty_write(device->comfd, &ch, 1)) return FALSE;
+    return TRUE;
+}
+
+static void fillinbuff(){
+    ssize_t got;
+    while((got = sl_tty_read(device))){
+        if(got < 0){
+            WARNX("Serial device disconnected!");
+            serial_close();
+        }else if(got){
+            if((size_t)got != sl_RB_write(rbin, (const uint8_t*)device->buf, got)){
+                WARNX("Rinbguffer overflow?");
+                sl_RB_clearbuf(rbin);
+                return;
+            }
+        }
+    }
+}
+
+// read one string line from serial
+// @arg deleted - N symbols deleted from rest of string (1 in case of '\n' and 2 in case of "\r\n")
+// @arg len - strlen of data
+char *serial_getline(int *len, int *deleted){
+    if(!device) return NULL;
+    static char buf[BUFSIZ];
+    fillinbuff();
+    // read old records
+    if(!sl_RB_readline(rbin, buf, BUFSIZ-1)) return NULL;
+    // remove trailing '\r'
+    int l = strlen(buf), d = 1;
+    if(l > -1 && buf[l - 1] == '\r'){
+        ++d;
+        buf[--l] = 0;
+    }
+    if(deleted) *deleted = d;
+    if(len) *len = l;
+    DBG("read: '%s'", buf);
+    return buf;
+}
+
+// get symbol
+int serial_getch(){
+    if(!device) return -1;
+    fillinbuff();
+    char C;
+    DBG("rb size: %zd", sl_RB_datalen(rbin));
+    size_t rd = sl_RB_read(rbin, (uint8_t*)&C, 1);
+    DBG("got %zd : '%c'", rd, C);
+    if(rd != 1) return -1;
+    //if(1 != sl_RB_read(rbin, (uint8_t*)&C, 1)) return -1;
+    return (int) C;
+}
+
+serial_ans_t serial_sendwans(const char *msg){
+    if(!msg || !device) return ANS_FAILED;
+    if(!serial_send_cmd(msg)) return ANS_FAILED;
+    double t0 = sl_dtime();
+    int ret = ANS_FAILED;
+    while(sl_dtime() - t0 < timeout && device){
+        char *ans = NULL;
+        if(!(ans = serial_getline(NULL, NULL))){ usleep(500); continue; }
+        DBG("Get line: '%s' (%zd bytes)", ans, strlen(ans));
+        if(!*ans) continue; // empty string
+        if(strcmp(ans, "OK") == 0 || strcmp(ans, "SEND OK") == 0){ ret = ANS_OK; goto rtn; }
+        if(strcmp(ans, "ERROR") == 0){ ret = ANS_ERR; goto rtn; }
+        if(strcmp(ans, "FAIL") == 0){ ret = ANS_FAILED; goto rtn; }
+        DBG("Return '%s' into buff", ans);
+        sl_RB_writestr(rbin, ans); // put other data into ringbuffer for further processing
+        sl_RB_putbyte(rbin, '\n');
+    }
+rtn:
+    DBG("proc time: %g", sl_dtime() - t0);
+    return ret;
+}
+
+// return NULL if `s` don't contain `t`, else return next symbol in `s`
+const char *serial_tidx(const char *s, const char *t){
+    if(!s) return NULL;
+    DBG("check '%s' for '%s'", s, t);
+    int pos = 0;
+    if(t){
+        const char *sub = strstr(s, t);
+        if(!sub) return NULL;
+        int l = strlen(t);
+        pos = (sub - s) + l;
+    }
+    DBG("pos = %d", pos);
+    return s + pos;
+}
+
+int serial_s2i(const char *s){
+    if(!s) return -1;
+    DBG("conv '%s' to %d", s, atoi(s));
+    return atoi(s);
+}

ESP8266/serial.h

@@ -0,0 +1,40 @@
+/*
+ * This file is part of the esp8266 project.
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+typedef enum{
+    ANS_FAILED,
+    ANS_OK,
+    ANS_ERR
+} serial_ans_t;
+
+void serial_clr();
+int serial_set_timeout(double tms);
+int serial_init(char *path, int speed);
+void serial_close();
+int serial_send_msg(const char *msg);
+int serial_send_cmd(const char *msg);
+int serial_putchar(char ch);
+serial_ans_t serial_sendwans(const char *msg);
+char *serial_getline(int *len, int *deleted);
+int serial_getch();
+
+// conversion functions for ESP
+const char *serial_tidx(const char *s, const char *t);
+int serial_s2i(const char *s);

I2Csensors/BMP180.c

@@ -0,0 +1,247 @@
+/*
+ * Copyright 2022 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <usefull_macros.h>
+
+#include "BMP180.h"
+#include "i2c.h"
+#include "sensors_private.h"
+
+
+enum{
+    BMP180_OVERS_1 = 0, // oversampling is off
+    BMP180_OVERS_2 = 1,
+    BMP180_OVERS_4 = 2,
+    BMP180_OVERS_8 = 3,
+    BMP180_OVERSMAX = 3
+};
+
+#define BMP180_CHIP_ID  0x55
+
+/**
+ * BMP180 registers
+ */
+#define BMP180_REG_OXLSB        (0xF8)
+#define BMP180_REG_OLSB         (0xF7)
+#define BMP180_REG_OMSB         (0xF6)
+#define BMP180_REG_OUT          (BMP180_REG_OMSB)
+#define BMP180_REG_CTRLMEAS     (0xF4)
+#define BMP180_REG_SOFTRESET    (0xE0)
+#define BMP180_REG_ID           (0xD0)
+#define BMP180_REG_CALIB        (0xAA)
+
+// shift for oversampling
+#define BMP180_CTRLM_OSS_SHIFT  (6)
+// start measurement
+#define BMP180_CTRLM_SCO        (1<<5)
+// measurements of P flag
+#define BMP180_CTRLM_PRES       (1<<4)
+// write it to BMP180_REG_SOFTRESET for soft reset
+#define BMP180_SOFTRESET_VAL    (0xB6)
+// start measurement of T/P
+#define BMP180_READ_T           (0x0E)
+#define BMP180_READ_P           (0x14)
+
+// mind that user can't change this
+static const uint8_t bmp180_os = BMP180_OVERSMAX;
+
+typedef struct {
+    int16_t     AC1;
+    int16_t     AC2;
+    int16_t     AC3;
+    uint16_t    AC4;
+    uint16_t    AC5;
+    uint16_t    AC6;
+    int16_t     B1;
+    int16_t     B2;
+    int16_t     MB;
+    int16_t     MC;
+    int16_t     MD;
+    int32_t     MCfix;
+    int32_t     AC1_fix;
+    int32_t     Tuncomp; // uncompensated T value
+    uint8_t     calibrated; // ==1 if calibration done
+} __attribute__ ((packed)) CaliData_t;
+
+/*
+static void BMP180_setOS(BMP180_oversampling os){
+    bmp180_os = os & 0x03;
+}*/
+// get compensation data, return 1 if OK
+static int readcompdata(sensor_t *s){
+    FNAME();
+    if(!s->privdata){
+        s->privdata = calloc(1, sizeof(CaliData_t));
+        DBG("ALLOCA");
+    }
+    if(!i2c_read_data8(BMP180_REG_CALIB, sizeof(CaliData_t), (uint8_t*)s->privdata)) return FALSE;
+    CaliData_t *CaliData = (CaliData_t*)s->privdata;
+    // convert big-endian into little-endian
+    uint16_t *arr = (uint16_t*)(s->privdata);
+    for(int i = 0; i < 11; ++i) arr[i] = __builtin_bswap16(arr[i]);
+    // prepare for further calculations
+    CaliData->MCfix = CaliData->MC << 11;
+    CaliData->AC1_fix = CaliData->AC1 << 2;
+    CaliData->calibrated = 1;
+    DBG("Calibration rdy");
+    return TRUE;
+}
+
+// do a soft-reset procedure
+static int BMP180_reset(sensor_t _U_ *s){
+    if(!i2c_write_reg8(BMP180_REG_SOFTRESET, BMP180_SOFTRESET_VAL)){
+        DBG("Can't reset\n");
+        return FALSE;
+    }
+    return TRUE;
+}
+
+// read compensation data & write registers
+static int BMP180_init(sensor_t *s){
+    s->status = SENS_NOTINIT;
+    if(!BMP180_reset(s)) return FALSE;
+    uint8_t devID;
+    if(!i2c_read_reg8(BMP180_REG_ID, &devID)){
+        DBG("Can't read BMP180_REG_ID");
+        return FALSE;
+    }
+    DBG("Got device ID: 0x%02x", devID);
+    if(devID != BMP180_CHIP_ID){
+        DBG("Not BMP180\n");
+        return FALSE;
+    }
+    if(!readcompdata(s)){
+        DBG("Can't read calibration data\n");
+        return FALSE;
+    }else{
+#ifdef EBUG
+        CaliData_t *CaliData = (CaliData_t*)s->privdata;
+#endif
+        DBG("AC1=%d, AC2=%d, AC3=%d, AC4=%u, AC5=%u, AC6=%u", CaliData->AC1, CaliData->AC2, CaliData->AC3, CaliData->AC4, CaliData->AC5, CaliData->AC6);
+        DBG("B1=%d, B2=%d", CaliData->B1, CaliData->B2);
+        DBG("MB=%d, MC=%d, MD=%d", CaliData->MB, CaliData->MC, CaliData->MD);
+    }
+    s->status = SENS_RELAX;
+    return TRUE;
+}
+
+// start measurement, @return 1 if all OK
+static int BMP180_start(sensor_t *s){
+    if(!s->privdata || s->status == SENS_BUSY || ((CaliData_t*)s->privdata)->calibrated == 0) return FALSE;
+    uint8_t reg = BMP180_READ_T | BMP180_CTRLM_SCO;
+    if(!i2c_write_reg8(BMP180_REG_CTRLMEAS, reg)){
+        s->status = SENS_ERR;
+        DBG("Can't write CTRL reg\n");
+        return FALSE;
+    }
+    s->status = SENS_BUSY;
+    return TRUE;
+}
+
+
+// calculate T degC and P in Pa
+static inline void compens(sensor_t *s, uint32_t Pval){
+    CaliData_t *CaliData = (CaliData_t*)s->privdata;
+    // T:
+    int32_t X1 = ((CaliData->Tuncomp - CaliData->AC6)*CaliData->AC5) >> 15;
+    int32_t X2 = CaliData->MCfix / (X1 + CaliData->MD);
+    int32_t B5 = X1 + X2;
+    s->data.T = (B5 + 8.) / 160.;
+    // P:
+    int32_t B6 = B5 - 4000;
+    X1 = (CaliData->B2 * ((B6*B6) >> 12)) >> 11;
+    X2 = (CaliData->AC2 * B6) >> 11;
+    int32_t X3 = X1 + X2;
+    int32_t B3 = (((CaliData->AC1_fix + X3) << bmp180_os) + 2) >> 2;
+    X1 = (CaliData->AC3 * B6) >> 13;
+    X2 = (CaliData->B1 * ((B6 * B6) >> 12)) >> 16;
+    X3 = ((X1 + X2) + 2) >> 2;
+    uint32_t B4 = (CaliData->AC4 * (uint32_t) (X3 + 32768)) >> 15;
+    uint32_t B7 = (uint32_t)((int32_t)Pval - B3) * (50000 >> bmp180_os);
+    int32_t p = 0;
+    if(B7 < 0x80000000){
+        p = (B7 << 1) / B4;
+    }else{
+        p = (B7 / B4) << 1;
+    }
+    X1 = p >> 8;
+    X1 *= X1;
+    X1 = (X1 * 3038) >> 16;
+    X2 = (-7357 * p) / 65536;
+    s->data.P = (p + ((X1 + X2 + 3791) / 16)) / 100.; // convert to hPa
+}
+
+static sensor_status_t BMP180_process(sensor_t *s){
+    uint8_t reg, stat;
+    uint8_t uncomp_data[3];
+    CaliData_t *CaliData = (CaliData_t*)s->privdata;
+    if(s->status != SENS_BUSY) goto ret;
+    if(!i2c_read_reg8(BMP180_REG_CTRLMEAS, &stat)){ s->status = SENS_ERR; goto ret; }
+    DBG("stat=0x%02X", stat);
+    if(stat & BMP180_CTRLM_SCO) goto ret; // still measure
+    if((stat & BMP180_CTRLM_PRES) == 0){ // wait for temperature
+        // get uncompensated data
+        DBG("Read uncompensated T\n");
+        if(!i2c_read_data8(BMP180_REG_OUT, 2, uncomp_data)){
+            s->status = SENS_ERR;
+            goto ret;
+        }
+        CaliData->Tuncomp = uncomp_data[0] << 8 | uncomp_data[1];
+        DBG("Tuncomp=%d, Start P measuring\n", CaliData->Tuncomp);
+        reg = BMP180_READ_P | BMP180_CTRLM_SCO | (bmp180_os << BMP180_CTRLM_OSS_SHIFT);
+        if(!i2c_write_reg8(BMP180_REG_CTRLMEAS, reg)){
+            s->status = SENS_ERR;
+            goto ret;
+        }
+    }else{ // wait for pressure
+        DBG("Read uncompensated P\n");
+        if(!i2c_read_data8(BMP180_REG_OUT, 3, uncomp_data)){
+            s->status = SENS_ERR;
+            goto ret;
+        }
+        uint32_t Pval = uncomp_data[0] << 16 | uncomp_data[1] << 8 | uncomp_data[2];
+        Pval >>= (8 - bmp180_os);
+        DBG("Puncomp=%d", Pval);
+        // calculate compensated values
+        compens(s, Pval);
+        DBG("All data ready\n");
+        s->status = SENS_RDY; // data ready
+    }
+ret:
+    return s->status;
+}
+
+static sensor_props_t BMP180_props(sensor_t _U_ *s){
+    sensor_props_t p = {.T = 1, .P = 1};
+    return p;
+}
+
+static int s_heater(sensor_t _U_ *s, int _U_ on){
+    return FALSE;
+}
+
+sensor_t BMP180 = {
+    .name = "BMP180",
+    .address = 0x77,
+    .status = SENS_NOTINIT,
+    .init = BMP180_init,
+    .start = BMP180_start,
+    .heater = s_heater,
+    .process = BMP180_process,
+    .properties = BMP180_props,
+};

I2Csensors/BMP180.h

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2021 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+#include "i2csensorsPTH.h"
+
+extern sensor_t BMP180;

I2Csensors/BMP280.c

@@ -0,0 +1,385 @@
+/*
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <usefull_macros.h>
+
+#include "BMP280.h"
+#include "i2c.h"
+#include "sensors_private.h"
+
+
+/**
+ * BMP280 registers
+ */
+#define BMP280_REG_HUM_LSB      0xFE
+#define BMP280_REG_HUM_MSB      0xFD
+#define BMP280_REG_HUM          (BMP280_REG_HUM_MSB)
+#define BMP280_REG_TEMP_XLSB    0xFC /* bits: 7-4 */
+#define BMP280_REG_TEMP_LSB     0xFB
+#define BMP280_REG_TEMP_MSB     0xFA
+#define BMP280_REG_TEMP         (BMP280_REG_TEMP_MSB)
+#define BMP280_REG_PRESS_XLSB   0xF9 /* bits: 7-4 */
+#define BMP280_REG_PRESS_LSB    0xF8
+#define BMP280_REG_PRESS_MSB    0xF7
+#define BMP280_REG_PRESSURE     (BMP280_REG_PRESS_MSB)
+#define BMP280_REG_ALLDATA      (BMP280_REG_PRESS_MSB) // all data: P, T & H
+#define BMP280_REG_CONFIG       0xF5 /* bits: 7-5 t_sb; 4-2 filter; 0 spi3w_en */
+#define BMP280_REG_CTRL         0xF4 /* bits: 7-5 osrs_t; 4-2 osrs_p; 1-0 mode */
+#define BMP280_REG_STATUS       0xF3 /* bits: 3 measuring; 0 im_update */
+#define BMP280_STATUS_MSRNG     (1<<3) // measuring flag
+#define BMP280_STATUS_UPDATE    (1<<0) // update flag
+#define BMP280_REG_CTRL_HUM     0xF2 /* bits: 2-0 osrs_h; */
+#define BMP280_REG_RESET        0xE0
+#define BMP280_RESET_VALUE     0xB6
+#define BMP280_REG_ID           0xD0
+
+#define BMP280_REG_CALIBA       0x88
+#define BMP280_CALIBA_SIZE      (26)  // 26 bytes of calibration registers sequence from 0x88 to 0xa1
+#define BMP280_CALIBB_SIZE      (7)   // 7 bytes of calibration registers sequence from 0xe1 to 0xe7
+#define BMP280_REG_CALIB_H1     0xA1  // dig_H1
+#define BMP280_REG_CALIBB       0xE1
+
+#define BMP280_MODE_FORSED      (1)  // force single measurement
+#define BMP280_MODE_NORMAL      (3)  // run continuosly
+
+#define BMP280_CHIP_ID  0x58
+#define BME280_CHIP_ID  0x60
+
+typedef enum{ // K for filtering: next = [prev*(k-1) + data_ADC]/k
+    BMP280_FILTER_OFF = 0, // k=1, no filtering
+    BMP280_FILTER_2   = 1, // k=2, 2 samples to reach >75% of data_ADC
+    BMP280_FILTER_4   = 2, // k=4, 5 samples
+    BMP280_FILTER_8   = 3, // k=8, 11 samples
+    BMP280_FILTER_16  = 4, // k=16, 22 samples
+} BMP280_Filter;
+
+typedef enum{ // Number of oversampling
+    BMP280_NOMEASUR = 0,
+    BMP280_OVERS1   = 1,
+    BMP280_OVERS2   = 2,
+    BMP280_OVERS4   = 3,
+    BMP280_OVERS8   = 4,
+    BMP280_OVERS16  = 5,
+} BMP280_Oversampling;
+
+typedef struct{
+    BMP280_Filter filter;       // filtering
+    BMP280_Oversampling p_os;   // oversampling for pressure
+    BMP280_Oversampling t_os;   // -//- temperature
+    BMP280_Oversampling h_os;   // -//- humidity
+    uint8_t ID;                 // identificator
+    uint8_t regctl;             // control register base value [(params.t_os << 5) | (params.p_os << 2)]
+} BPM280_params_t;
+
+// default parameters for initialized s->privdata
+static const BPM280_params_t defparams = {
+    .filter = BMP280_FILTER_4,
+    .p_os   = BMP280_OVERS16,
+    .t_os   = BMP280_OVERS16,
+    .h_os   = BMP280_OVERS16,
+    .ID     = 0
+};
+
+typedef struct {
+    // temperature
+    uint16_t dig_T1;    // 0x88 (LSB), 0x98 (MSB)
+    int16_t  dig_T2;    // ...
+    int16_t  dig_T3;
+    // pressure
+    uint16_t dig_P1;
+    int16_t  dig_P2;
+    int16_t  dig_P3;
+    int16_t  dig_P4;
+    int16_t  dig_P5;
+    int16_t  dig_P6;
+    int16_t  dig_P7;
+    int16_t  dig_P8;
+    int16_t  dig_P9;    // 0x9e, 0x9f
+    // humidity (partially calculated from EEE struct)
+    uint8_t unused;     // 0xA0
+    uint8_t dig_H1;     // 0xA1
+    int16_t dig_H2;     // 0xE1...
+    uint8_t dig_H3;     // only from EEE
+    uint16_t dig_H4;
+    uint16_t dig_H5;
+    int8_t dig_H6;
+    // calibration done
+    uint8_t  calibrated;
+    // parameters
+    BPM280_params_t params;
+} __attribute__ ((packed)) CaliData_t;
+
+/*
+// setters for `params`
+void BMP280_setfilter(sensor_t *s, BMP280_Filter f){
+    ((CaliData_t*)s->privdata)->params.filter = f;
+}
+void BMP280_setOSt(sensor_t *s, BMP280_Oversampling os){
+    ((CaliData_t*)s->privdata)->params.t_os = os;
+}
+void BMP280_setOSp(sensor_t *s, BMP280_Oversampling os){
+    ((CaliData_t*)s->privdata)->params.p_os = os;
+}
+void BMP280_setOSh(sensor_t *s, BMP280_Oversampling os){
+    ((CaliData_t*)s->privdata)->params.h_os = os;
+}*/
+
+
+
+// get compensation data, return 1 if OK
+static int readcompdata(sensor_t *s){
+    FNAME();
+    CaliData_t *CaliData = (CaliData_t*)s->privdata;
+    if(!i2c_read_data8(BMP280_REG_CALIBA, BMP280_CALIBA_SIZE, (uint8_t*)CaliData)){
+        DBG("Can't read calibration A data");
+        return FALSE;
+    }
+    if(CaliData->params.ID == BME280_CHIP_ID){
+        uint8_t EEE[BMP280_CALIBB_SIZE] = {0};
+        if(!i2c_read_reg8(BMP280_REG_CALIB_H1, &CaliData->dig_H1)){
+            WARNX("Can't read dig_H1");
+            return FALSE;
+        }
+        if(!i2c_read_data8(BMP280_REG_CALIBB, BMP280_CALIBB_SIZE, EEE)){
+            WARNX("Can't read rest of dig_Hx");
+            return FALSE;
+        }
+        // E5 is divided by two parts so we need this sex
+        CaliData->dig_H2 = (EEE[1] << 8) | EEE[0];
+        CaliData->dig_H3 = EEE[2];
+        CaliData->dig_H4 = (EEE[3] << 4) | (EEE[4] & 0x0f);
+        CaliData->dig_H5 = (EEE[5] << 4) | (EEE[4] >> 4);
+        CaliData->dig_H6 = EEE[6];
+    }
+    CaliData->calibrated = 1;
+    DBG("Calibration rdy");
+    return TRUE;
+}
+
+// do a soft-reset procedure
+static int s_reset(){
+    if(!i2c_write_reg8(BMP280_REG_RESET, BMP280_RESET_VALUE)){
+        DBG("Can't reset\n");
+        return FALSE;
+    }
+    return TRUE;
+}
+
+// read compensation data & write registers
+static int s_init(sensor_t *s){
+    s->status = SENS_NOTINIT;
+    uint8_t devid;
+    if(!i2c_read_reg8(BMP280_REG_ID, &devid)){
+        DBG("Can't read BMP280_REG_ID");
+        return FALSE;
+    }
+    DBG("Got device ID: 0x%02x", devid);
+    if(devid != BMP280_CHIP_ID && devid != BME280_CHIP_ID){
+        WARNX("Not BM[P/E]280\n");
+        return FALSE;
+    }
+    if(!s_reset()) return FALSE;
+    // wait whlie update done
+    uint8_t reg = BMP280_STATUS_UPDATE;
+    while(reg & BMP280_STATUS_UPDATE){ // wait while update is done
+        if(!i2c_read_reg8(BMP280_REG_STATUS, &reg)){
+            DBG("Can't read status");
+            return FALSE;
+        }
+    }
+    // allocate calibration and other data if need
+    if(!s->privdata){
+        s->privdata = calloc(1, sizeof(CaliData_t));
+        ((CaliData_t*)s->privdata)->params = defparams; // and init default parameters
+        DBG("ALLOCA");
+    }else ((CaliData_t*)s->privdata)->calibrated = 0;
+    BPM280_params_t *params = &((CaliData_t*)s->privdata)->params;
+    params->ID = devid;
+    if(!readcompdata(s)){
+        DBG("Can't read calibration data\n");
+        return FALSE;
+    }else{
+#ifdef EBUG
+        CaliData_t *CaliData = (CaliData_t*)s->privdata;
+        DBG("T: %d, %d, %d", CaliData->dig_T1, CaliData->dig_T2, CaliData->dig_T3);
+        DBG("\P: %d, %d, %d, %d, %d, %d, %d, %d, %d", CaliData->dig_P1, CaliData->dig_P2, CaliData->dig_P3,
+            CaliData->dig_P4, CaliData->dig_P5, CaliData->dig_P6, CaliData->dig_P7, CaliData->dig_P8, CaliData->dig_P9);
+        if(devid == BME280_CHIP_ID){ // H compensation
+            DBG("H: %d, %d, %d, %d, %d, %d", CaliData->dig_H1, CaliData->dig_H2, CaliData->dig_H3,
+                CaliData->dig_H4, CaliData->dig_H5, CaliData->dig_H6);
+        }
+#endif
+    }
+    // write filter configuration
+    reg = params->filter << 2;
+    if(!i2c_write_reg8(BMP280_REG_CONFIG, reg)){
+        DBG("Can't save filter settings\n");
+        return FALSE;
+    }
+    reg = (params->t_os << 5) | (params->p_os << 2); // oversampling for P/T, sleep mode
+    if(!i2c_write_reg8(BMP280_REG_CTRL, reg)){
+        DBG("Can't write settings for P/T\n");
+        return FALSE;
+    }
+    params->regctl = reg;
+    if(devid == BME280_CHIP_ID){ // write CTRL_HUM only AFTER CTRL!
+        reg = params->h_os;
+        if(!i2c_write_reg8(BMP280_REG_CTRL_HUM, reg)){
+            DBG("Can't write settings for H\n");
+            return FALSE;
+        }
+    }
+    DBG("OK, inited");
+    s->status = SENS_RELAX;
+    return TRUE;
+}
+
+// start measurement, @return 1 if all OK
+static int s_start(sensor_t *s){
+    if(!s->privdata || s->status == SENS_BUSY || ((CaliData_t*)s->privdata)->calibrated == 0) return FALSE;
+    uint8_t reg = ((CaliData_t*)s->privdata)->params.regctl | BMP280_MODE_FORSED; // start single measurement
+    if(!i2c_write_reg8(BMP280_REG_CTRL, reg)){
+        DBG("Can't write CTRL reg\n");
+        return FALSE;
+    }
+    s->status = SENS_BUSY;
+    return TRUE;
+}
+
+
+// return T in degC
+static inline float compTemp(sensor_t *s, int32_t adc_temp, int32_t *t_fine){
+    CaliData_t *CaliData = (CaliData_t*)s->privdata;
+    int32_t var1, var2;
+    var1 = ((((adc_temp >> 3) - ((int32_t) CaliData->dig_T1 << 1)))
+            * (int32_t) CaliData->dig_T2) >> 11;
+    var2 = (((((adc_temp >> 4) - (int32_t) CaliData->dig_T1)
+              * ((adc_temp >> 4) - (int32_t) CaliData->dig_T1)) >> 12)
+            * (int32_t) CaliData->dig_T3) >> 14;
+    *t_fine = var1 + var2;
+    return ((*t_fine * 5 + 128) >> 8) / 100.;
+}
+
+// return P in Pa
+static inline double compPres(sensor_t *s, int32_t adc_press, int32_t fine_temp){
+    CaliData_t *CaliData = (CaliData_t*)s->privdata;
+    int64_t var1, var2, p;
+    var1 = (int64_t) fine_temp - 128000;
+    var2 = var1 * var1 * (int64_t) CaliData->dig_P6;
+    var2 = var2 + ((var1 * (int64_t) CaliData->dig_P5) << 17);
+    var2 = var2 + (((int64_t) CaliData->dig_P4) << 35);
+    var1 = ((var1 * var1 * (int64_t) CaliData->dig_P3) >> 8)
+           + ((var1 * (int64_t) CaliData->dig_P2) << 12);
+    var1 = (((int64_t) 1 << 47) + var1) * ((int64_t) CaliData->dig_P1) >> 33;
+    if (var1 == 0){
+        return 0;  // avoid exception caused by division by zero
+    }
+    p = 1048576 - adc_press;
+    p = (((p << 31) - var2) * 3125) / var1;
+    var1 = ((int64_t) CaliData->dig_P9 * (p >> 13) * (p >> 13)) >> 25;
+    var2 = ((int64_t) CaliData->dig_P8 * p) >> 19;
+    p = ((p + var1 + var2) >> 8) + ((int64_t) CaliData->dig_P7 << 4);
+    return p/25600.; // hPa
+}
+
+// return H in percents
+static inline double compHum(sensor_t *s, int32_t adc_hum, int32_t fine_temp){
+    CaliData_t *CaliData = (CaliData_t*)s->privdata;
+    int32_t v_x1_u32r;
+    v_x1_u32r = fine_temp - (int32_t) 76800;
+    v_x1_u32r = ((((adc_hum << 14) - (((int32_t)CaliData->dig_H4) << 20)
+                   - (((int32_t)CaliData->dig_H5) * v_x1_u32r)) + (int32_t)16384) >> 15)
+                * (((((((v_x1_u32r * ((int32_t)CaliData->dig_H6)) >> 10)
+                       * (((v_x1_u32r * ((int32_t)CaliData->dig_H3)) >> 11)
+                          + (int32_t)32768)) >> 10) + (int32_t)2097152)
+                        * ((int32_t)CaliData->dig_H2) + 8192) >> 14);
+    v_x1_u32r = v_x1_u32r
+                - (((((v_x1_u32r >> 15) * (v_x1_u32r >> 15)) >> 7)
+                    * ((int32_t)CaliData->dig_H1)) >> 4);
+    v_x1_u32r = v_x1_u32r < 0 ? 0 : v_x1_u32r;
+    v_x1_u32r = v_x1_u32r > 419430400 ? 419430400 : v_x1_u32r;
+    return (v_x1_u32r >> 12)/1024.;
+}
+
+static sensor_status_t s_process(sensor_t *s){
+    uint8_t reg;
+    if(s->status != SENS_BUSY) goto ret;
+    if(!i2c_read_reg8(BMP280_REG_STATUS, &reg)) return (s->status = SENS_ERR);
+    DBG("stat=0x%02X", reg);
+    if(reg & BMP280_STATUS_MSRNG) goto ret;
+    // OK, measurements done -> get and calculate data
+    CaliData_t *CaliData = (CaliData_t*)s->privdata;
+    uint8_t ID = CaliData->params.ID;
+    uint8_t datasz = 8; // amount of bytes to read
+    uint8_t data[8];
+    if(ID == BMP280_CHIP_ID) datasz = 6; // no humidity
+    if(!i2c_read_data8(BMP280_REG_ALLDATA, datasz, data)){
+        DBG("Can't read data");
+        return (s->status = SENS_ERR);
+    }
+    int32_t p = (data[0] << 12) | (data[1] << 4) | (data[2] >> 4);
+    DBG("puncomp = %d", p);
+    int32_t t = (data[3] << 12) | (data[4] << 4) | (data[5] >> 4);
+    DBG("tuncomp = %d", t);
+    int32_t t_fine;
+    s->data.T = compTemp(s, t, &t_fine);
+    DBG("tfine = %d", t_fine);
+    s->data.P = compPres(s, p, t_fine);
+    if(ID == BME280_CHIP_ID){
+        int32_t h = (data[6] << 8) | data[7];
+        DBG("huncomp = %d", h);
+        s->data.H = compHum(s, h, t_fine);
+    }
+    s->status = SENS_RDY;
+ret:
+    return s->status;
+}
+
+static sensor_props_t s_props(sensor_t *s){
+    sensor_props_t p = {.T = 1, .P = 1};
+    if(s && s->privdata){
+        if(((CaliData_t*)s->privdata)->params.ID == BME280_CHIP_ID) p.H = 1;
+    }
+    return p;
+}
+
+static int s_heater(sensor_t _U_ *s, int _U_ on){
+    return FALSE;
+}
+
+sensor_t BMP280 = {
+    .name = "BMP280",
+    .address = 0x76,
+    .status = SENS_NOTINIT,
+    .init = s_init,
+    .start = s_start,
+    .heater = s_heater,
+    .process = s_process,
+    .properties = s_props,
+};
+
+sensor_t BME280 = {
+    .name = "BME280",
+    .address = 0x76,
+    .status = SENS_NOTINIT,
+    .init = s_init,
+    .start = s_start,
+    .heater = s_heater,
+    .process = s_process,
+    .properties = s_props,
+};

I2Csensors/BMP280.h

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2021 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+#include "i2csensorsPTH.h"
+
+extern sensor_t BMP280;
+extern sensor_t BME280;

I2Csensors/BMP580.c

@@ -0,0 +1,513 @@
+/*
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <usefull_macros.h>
+
+#include "BMP580.h"
+#include "i2c.h"
+#include "sensors_private.h"
+
+/**
+ * BMP580 registers
+ */
+#define BMP5_REG_CHIP_ID            (0x01)
+#define BMP5_REG_REV_ID             (0x02)
+#define BMP5_REG_CHIP_STATUS        (0x11)
+#define BMP5_REG_DRIVE_CONFIG       (0x13)
+#define BMP5_REG_INT_CONFIG         (0x14)
+#define BMP5_REG_INT_SOURCE         (0x15)
+#define BMP5_REG_FIFO_CONFIG        (0x16)
+#define BMP5_REG_FIFO_COUNT         (0x17)
+#define BMP5_REG_FIFO_SEL           (0x18)
+#define BMP5_REG_TEMP_DATA_XLSB     (0x1D)
+#define BMP5_REG_TEMP_DATA_LSB      (0x1E)
+#define BMP5_REG_TEMP_DATA_MSB      (0x1F)
+#define BMP5_REG_PRESS_DATA_XLSB    (0x20)
+#define BMP5_REG_PRESS_DATA_LSB     (0x21)
+#define BMP5_REG_PRESS_DATA_MSB     (0x22)
+#define BMP5_REG_INT_STATUS         (0x27)
+#define BMP5_REG_STATUS             (0x28)
+#define BMP5_REG_FIFO_DATA          (0x29)
+#define BMP5_REG_NVM_ADDR           (0x2B)
+#define BMP5_REG_NVM_DATA_LSB       (0x2C)
+#define BMP5_REG_NVM_DATA_MSB       (0x2D)
+#define BMP5_REG_DSP_CONFIG         (0x30)
+#define BMP5_REG_DSP_IIR            (0x31)
+#define BMP5_REG_OOR_THR_P_LSB      (0x32)
+#define BMP5_REG_OOR_THR_P_MSB      (0x33)
+#define BMP5_REG_OOR_RANGE          (0x34)
+#define BMP5_REG_OOR_CONFIG         (0x35)
+#define BMP5_REG_OSR_CONFIG         (0x36)
+#define BMP5_REG_ODR_CONFIG         (0x37)
+#define BMP5_REG_OSR_EFF            (0x38)
+#define BMP5_REG_CMD                (0x7E)
+
+#define BMP5_CMD_NVMEN          (0x5D)
+#define BMP5_CMD_NVMWRITE       (0xA0)
+#define BMP5_CMD_NVMREAD        (0xA5)
+#define BMP5_CMD_RESET          (0xB6)
+
+#define BMP5_OSR_P_ENABLE       (1<<6)
+
+#define BMP5_CHIP_ID            (0x50)
+#define BMP585_CHIP_ID          (0x51)
+
+// ODR settings
+#define BMP5_ODR_240_HZ         (0x00)
+#define BMP5_ODR_218_5_HZ       (0x01)
+#define BMP5_ODR_199_1_HZ       (0x02)
+#define BMP5_ODR_179_2_HZ       (0x03)
+#define BMP5_ODR_160_HZ         (0x04)
+#define BMP5_ODR_149_3_HZ       (0x05)
+#define BMP5_ODR_140_HZ         (0x06)
+#define BMP5_ODR_129_8_HZ       (0x07)
+#define BMP5_ODR_120_HZ         (0x08)
+#define BMP5_ODR_110_1_HZ       (0x09)
+#define BMP5_ODR_100_2_HZ       (0x0A)
+#define BMP5_ODR_89_6_HZ        (0x0B)
+#define BMP5_ODR_80_HZ          (0x0C)
+#define BMP5_ODR_70_HZ          (0x0D)
+#define BMP5_ODR_60_HZ          (0x0E)
+#define BMP5_ODR_50_HZ          (0x0F)
+#define BMP5_ODR_45_HZ          (0x10)
+#define BMP5_ODR_40_HZ          (0x11)
+#define BMP5_ODR_35_HZ          (0x12)
+#define BMP5_ODR_30_HZ          (0x13)
+#define BMP5_ODR_25_HZ          (0x14)
+#define BMP5_ODR_20_HZ          (0x15)
+#define BMP5_ODR_15_HZ          (0x16)
+#define BMP5_ODR_10_HZ          (0x17)
+#define BMP5_ODR_05_HZ          (0x18)
+#define BMP5_ODR_04_HZ          (0x19)
+#define BMP5_ODR_03_HZ          (0x1A)
+#define BMP5_ODR_02_HZ          (0x1B)
+#define BMP5_ODR_01_HZ          (0x1C)
+#define BMP5_ODR_0_5_HZ         (0x1D)
+#define BMP5_ODR_0_250_HZ       (0x1E)
+#define BMP5_ODR_0_125_HZ       (0x1F)
+
+#define BMP5_FIFO_EMPTY                     (0X7F)
+#define BMP5_FIFO_MAX_THRESHOLD_P_T_MODE    (0x0F)
+#define BMP5_FIFO_MAX_THRESHOLD_P_MODE      (0x1F)
+
+// bypass both iir_t and iir_p
+#define BMP5_IIR_BYPASS         (0xC0)
+
+// Pressure Out-of-range count limit
+#define BMP5_OOR_COUNT_LIMIT_1  (0x00)
+#define BMP5_OOR_COUNT_LIMIT_3  (0x01)
+#define BMP5_OOR_COUNT_LIMIT_7  (0x02)
+#define BMP5_OOR_COUNT_LIMIT_15 (0x03)
+
+
+typedef enum{ // K for filtering: next = [prev*(k-1) + data_ADC]/k
+    BMP580_FILTER_OFF = 0,
+    BMP580_FILTER_1   = 1,
+    BMP580_FILTER_3   = 2,
+    BMP580_FILTER_7   = 3,
+    BMP580_FILTER_15  = 4,
+    BMP580_FILTER_31  = 5,
+    BMP580_FILTER_63  = 6,
+    BMP580_FILTER_127 = 7,
+} BMP580_Filter;
+
+typedef enum{ // Number of oversampling
+    BMP580_OVERS1   = 1,
+    BMP580_OVERS2   = 2,
+    BMP580_OVERS4   = 3,
+    BMP580_OVERS8   = 4,
+    BMP580_OVERS16  = 5,
+    BMP580_OVERS32  = 5,
+    BMP580_OVERS64  = 5,
+    BMP580_OVERS128 = 5,
+} BMP580_Oversampling;
+
+typedef enum{
+    BMP580_POW_STANDBY = 0,
+    BMP580_POW_NORMAL = 1,
+    BMP580_POW_FORCED = 2,
+    BMP580_POW_NONSTOP = 3
+} BMP580_Powermode;
+
+typedef struct{
+    BMP580_Filter filter;       // filtering
+    BMP580_Oversampling p_os;   // oversampling for pressure
+    BMP580_Oversampling t_os;   // -//- temperature
+    BMP580_Powermode pmode;     // power mode
+    uint8_t odr;                // oversampling data rage
+    uint8_t ID;                 // identificator
+} BPM580_params_t;
+
+// default parameters for initialization
+static const BPM580_params_t defparams = {
+    .filter = BMP580_FILTER_7,
+    .p_os   = BMP580_OVERS128,
+    .t_os   = BMP580_OVERS128,
+    .pmode  = BMP580_POW_FORCED,
+    .odr    = BMP5_ODR_01_HZ,
+    .ID     = 0
+};
+
+// do a soft-reset procedure
+static int s_reset(){
+    if(!i2c_write_reg8(BMP5_REG_CMD, BMP5_CMD_RESET)){
+        DBG("Can't reset\n");
+        return FALSE;
+    }
+    return TRUE;
+}
+
+static int s_init(sensor_t *s){
+    if(!s) return FALSE;
+    s->status = SENS_NOTINIT;
+    uint8_t devid;
+    DBG("HERE");
+    if(!i2c_read_reg8(BMP5_REG_CHIP_ID, &devid)){
+        DBG("Can't read BMP280_REG_ID");
+        return FALSE;
+    }
+    DBG("Got device ID: 0x%02x", devid);
+    if(devid != BMP5_CHIP_ID && devid != BMP585_CHIP_ID){
+        WARNX("Not BMP58x\n");
+        return FALSE;
+    }
+    if(!s_reset()) return FALSE;
+    // allocate calibration and other data if need
+    if(!s->privdata){
+        s->privdata = calloc(1, sizeof(BPM580_params_t));
+        DBG("ALLOCA");
+    }
+    BPM580_params_t *params = (BPM580_params_t*)s->privdata;
+    *params = defparams;
+    params->ID = devid;
+    if(!i2c_write_reg8(BMP5_REG_DSP_IIR, params->filter << 3 | params->filter)){
+        DBG("Can't set filter");
+    }
+    if(!i2c_write_reg8(BMP5_REG_OSR_CONFIG, BMP5_OSR_P_ENABLE | params->p_os << 3 | params->t_os)){
+        DBG("Can't set oversampling");
+    }
+    if(!i2c_write_reg8(BMP5_REG_ODR_CONFIG, params->odr << 2 | params->pmode)){
+        DBG("Can't set ODR");
+    }
+    if(!i2c_write_reg8(BMP5_REG_INT_SOURCE, 1)){
+        DBG("Can't setup interrupt on data ready");
+    }
+    DBG("OK, inited");
+    s->status = SENS_RELAX;
+    return TRUE;
+}
+
+static int s_start(sensor_t *s){
+    if(!s || !s->privdata) return FALSE;
+    BPM580_params_t *params = (BPM580_params_t*)s->privdata;
+    if(params->pmode == BMP580_POW_STANDBY || params->pmode == BMP580_POW_FORCED){
+        if(!i2c_write_reg8(BMP5_REG_ODR_CONFIG, params->odr << 2 | BMP580_POW_FORCED)){
+            WARNX("Can't set ODR");
+            s->status = SENS_RELAX;
+            return FALSE;
+        }
+    }
+    s->status = SENS_BUSY;
+    return TRUE;
+}
+
+// Tdeg = MSB|LSB|XLSB / 2^16
+// Ppa  = MSB|LSB|XLSB / 2^6
+static sensor_status_t s_process(sensor_t *s){
+    if(!s) return SENS_NOTINIT;
+    uint8_t reg;
+    if(s->status != SENS_BUSY) goto ret;
+    if(!i2c_read_reg8(BMP5_REG_INT_STATUS, &reg)) return (s->status = SENS_ERR);
+    DBG("int=0x%02X", reg);
+    if(0 == (reg & 1)) goto ret;
+    // OK, measurements done -> get and calculate data
+    uint8_t rawdata[6];
+    if(!i2c_read_data8(BMP5_REG_TEMP_DATA_XLSB, 6, rawdata)){
+        WARNX("Can't read data");
+        return (s->status = SENS_ERR);
+    }
+    uint32_t T = rawdata[0] | rawdata[1] << 8 | rawdata[2] << 16;
+    uint32_t P = rawdata[3] | rawdata[4] << 8 | rawdata[5] << 16;
+    s->data.T = (double) T / (double)(1<<16);
+    s->data.P = (double) P / (double)(1<<6) / 100.; // hPa
+    s->status = SENS_RDY;
+ret:
+    return s->status;
+}
+
+#if 0
+typedef struct {
+    // temperature
+    uint16_t dig_T1;    // 0x88 (LSB), 0x98 (MSB)
+    int16_t  dig_T2;    // ...
+    int16_t  dig_T3;
+    // pressure
+    uint16_t dig_P1;
+    int16_t  dig_P2;
+    int16_t  dig_P3;
+    int16_t  dig_P4;
+    int16_t  dig_P5;
+    int16_t  dig_P6;
+    int16_t  dig_P7;
+    int16_t  dig_P8;
+    int16_t  dig_P9;    // 0x9e, 0x9f
+    // humidity (partially calculated from EEE struct)
+    uint8_t unused;     // 0xA0
+    uint8_t dig_H1;     // 0xA1
+    int16_t dig_H2;     // 0xE1...
+    uint8_t dig_H3;     // only from EEE
+    uint16_t dig_H4;
+    uint16_t dig_H5;
+    int8_t dig_H6;
+    // calibration done
+    uint8_t  calibrated;
+    // parameters
+    BPM280_params_t params;
+} __attribute__ ((packed)) CaliData_t;
+
+
+// get compensation data, return 1 if OK
+static int readcompdata(sensor_t *s){
+    FNAME();
+    CaliData_t *CaliData = (CaliData_t*)s->privdata;
+    if(!i2c_read_data8(BMP280_REG_CALIBA, BMP280_CALIBA_SIZE, (uint8_t*)CaliData)){
+        DBG("Can't read calibration A data");
+        return FALSE;
+    }
+    if(CaliData->params.ID == BME280_CHIP_ID){
+        uint8_t EEE[BMP280_CALIBB_SIZE] = {0};
+        if(!i2c_read_reg8(BMP280_REG_CALIB_H1, &CaliData->dig_H1)){
+            WARNX("Can't read dig_H1");
+            return FALSE;
+        }
+        if(!i2c_read_data8(BMP280_REG_CALIBB, BMP280_CALIBB_SIZE, EEE)){
+            WARNX("Can't read rest of dig_Hx");
+            return FALSE;
+        }
+        // E5 is divided by two parts so we need this sex
+        CaliData->dig_H2 = (EEE[1] << 8) | EEE[0];
+        CaliData->dig_H3 = EEE[2];
+        CaliData->dig_H4 = (EEE[3] << 4) | (EEE[4] & 0x0f);
+        CaliData->dig_H5 = (EEE[5] << 4) | (EEE[4] >> 4);
+        CaliData->dig_H6 = EEE[6];
+    }
+    CaliData->calibrated = 1;
+    DBG("Calibration rdy");
+    return TRUE;
+}
+
+// do a soft-reset procedure
+static int s_reset(){
+    if(!i2c_write_reg8(BMP280_REG_RESET, BMP280_RESET_VALUE)){
+        DBG("Can't reset\n");
+        return FALSE;
+    }
+    return TRUE;
+}
+
+// read compensation data & write registers
+static int s_init(sensor_t *s){
+    s->status = SENS_NOTINIT;
+    uint8_t devid;
+    if(!i2c_read_reg8(BMP280_REG_ID, &devid)){
+        DBG("Can't read BMP280_REG_ID");
+        return FALSE;
+    }
+    DBG("Got device ID: 0x%02x", devid);
+    if(devid != BMP280_CHIP_ID && devid != BME280_CHIP_ID){
+        WARNX("Not BM[P/E]280\n");
+        return FALSE;
+    }
+    if(!s_reset()) return FALSE;
+    // wait whlie update done
+    uint8_t reg = BMP280_STATUS_UPDATE;
+    while(reg & BMP280_STATUS_UPDATE){ // wait while update is done
+        if(!i2c_read_reg8(BMP280_REG_STATUS, &reg)){
+            DBG("Can't read status");
+            return FALSE;
+        }
+    }
+    // allocate calibration and other data if need
+    if(!s->privdata){
+        s->privdata = calloc(1, sizeof(CaliData_t));
+        ((CaliData_t*)s->privdata)->params = defparams; // and init default parameters
+        DBG("ALLOCA");
+    }else ((CaliData_t*)s->privdata)->calibrated = 0;
+    BPM280_params_t *params = &((CaliData_t*)s->privdata)->params;
+    params->ID = devid;
+    if(!readcompdata(s)){
+        DBG("Can't read calibration data\n");
+        return FALSE;
+    }else{
+#ifdef EBUG
+        CaliData_t *CaliData = (CaliData_t*)s->privdata;
+        DBG("T: %d, %d, %d", CaliData->dig_T1, CaliData->dig_T2, CaliData->dig_T3);
+        DBG("\P: %d, %d, %d, %d, %d, %d, %d, %d, %d", CaliData->dig_P1, CaliData->dig_P2, CaliData->dig_P3,
+            CaliData->dig_P4, CaliData->dig_P5, CaliData->dig_P6, CaliData->dig_P7, CaliData->dig_P8, CaliData->dig_P9);
+        if(devid == BME280_CHIP_ID){ // H compensation
+            DBG("H: %d, %d, %d, %d, %d, %d", CaliData->dig_H1, CaliData->dig_H2, CaliData->dig_H3,
+                CaliData->dig_H4, CaliData->dig_H5, CaliData->dig_H6);
+        }
+#endif
+    }
+    // write filter configuration
+    reg = params->filter << 2;
+    if(!i2c_write_reg8(BMP280_REG_CONFIG, reg)){
+        DBG("Can't save filter settings\n");
+        return FALSE;
+    }
+    reg = (params->t_os << 5) | (params->p_os << 2); // oversampling for P/T, sleep mode
+    if(!i2c_write_reg8(BMP280_REG_CTRL, reg)){
+        DBG("Can't write settings for P/T\n");
+        return FALSE;
+    }
+    params->regctl = reg;
+    if(devid == BME280_CHIP_ID){ // write CTRL_HUM only AFTER CTRL!
+        reg = params->h_os;
+        if(!i2c_write_reg8(BMP280_REG_CTRL_HUM, reg)){
+            DBG("Can't write settings for H\n");
+            return FALSE;
+        }
+    }
+    DBG("OK, inited");
+    s->status = SENS_RELAX;
+    return TRUE;
+}
+
+// start measurement, @return 1 if all OK
+static int s_start(sensor_t *s){
+    if(!s->privdata || s->status == SENS_BUSY || ((CaliData_t*)s->privdata)->calibrated == 0) return FALSE;
+    uint8_t reg = ((CaliData_t*)s->privdata)->params.regctl | BMP280_MODE_FORSED; // start single measurement
+    if(!i2c_write_reg8(BMP280_REG_CTRL, reg)){
+        DBG("Can't write CTRL reg\n");
+        return FALSE;
+    }
+    s->status = SENS_BUSY;
+    return TRUE;
+}
+
+
+// return T in degC
+static inline float compTemp(sensor_t *s, int32_t adc_temp, int32_t *t_fine){
+    CaliData_t *CaliData = (CaliData_t*)s->privdata;
+    int32_t var1, var2;
+    var1 = ((((adc_temp >> 3) - ((int32_t) CaliData->dig_T1 << 1)))
+            * (int32_t) CaliData->dig_T2) >> 11;
+    var2 = (((((adc_temp >> 4) - (int32_t) CaliData->dig_T1)
+              * ((adc_temp >> 4) - (int32_t) CaliData->dig_T1)) >> 12)
+            * (int32_t) CaliData->dig_T3) >> 14;
+    *t_fine = var1 + var2;
+    return ((*t_fine * 5 + 128) >> 8) / 100.;
+}
+
+// return P in Pa
+static inline double compPres(sensor_t *s, int32_t adc_press, int32_t fine_temp){
+    CaliData_t *CaliData = (CaliData_t*)s->privdata;
+    int64_t var1, var2, p;
+    var1 = (int64_t) fine_temp - 128000;
+    var2 = var1 * var1 * (int64_t) CaliData->dig_P6;
+    var2 = var2 + ((var1 * (int64_t) CaliData->dig_P5) << 17);
+    var2 = var2 + (((int64_t) CaliData->dig_P4) << 35);
+    var1 = ((var1 * var1 * (int64_t) CaliData->dig_P3) >> 8)
+           + ((var1 * (int64_t) CaliData->dig_P2) << 12);
+    var1 = (((int64_t) 1 << 47) + var1) * ((int64_t) CaliData->dig_P1) >> 33;
+    if (var1 == 0){
+        return 0;  // avoid exception caused by division by zero
+    }
+    p = 1048576 - adc_press;
+    p = (((p << 31) - var2) * 3125) / var1;
+    var1 = ((int64_t) CaliData->dig_P9 * (p >> 13) * (p >> 13)) >> 25;
+    var2 = ((int64_t) CaliData->dig_P8 * p) >> 19;
+    p = ((p + var1 + var2) >> 8) + ((int64_t) CaliData->dig_P7 << 4);
+    return p/25600.; // hPa
+}
+
+// return H in percents
+static inline double compHum(sensor_t *s, int32_t adc_hum, int32_t fine_temp){
+    CaliData_t *CaliData = (CaliData_t*)s->privdata;
+    int32_t v_x1_u32r;
+    v_x1_u32r = fine_temp - (int32_t) 76800;
+    v_x1_u32r = ((((adc_hum << 14) - (((int32_t)CaliData->dig_H4) << 20)
+                   - (((int32_t)CaliData->dig_H5) * v_x1_u32r)) + (int32_t)16384) >> 15)
+                * (((((((v_x1_u32r * ((int32_t)CaliData->dig_H6)) >> 10)
+                       * (((v_x1_u32r * ((int32_t)CaliData->dig_H3)) >> 11)
+                          + (int32_t)32768)) >> 10) + (int32_t)2097152)
+                        * ((int32_t)CaliData->dig_H2) + 8192) >> 14);
+    v_x1_u32r = v_x1_u32r
+                - (((((v_x1_u32r >> 15) * (v_x1_u32r >> 15)) >> 7)
+                    * ((int32_t)CaliData->dig_H1)) >> 4);
+    v_x1_u32r = v_x1_u32r < 0 ? 0 : v_x1_u32r;
+    v_x1_u32r = v_x1_u32r > 419430400 ? 419430400 : v_x1_u32r;
+    return (v_x1_u32r >> 12)/1024.;
+}
+
+static sensor_status_t s_process(sensor_t *s){
+    uint8_t reg;
+    if(s->status != SENS_BUSY) goto ret;
+    if(!i2c_read_reg8(BMP280_REG_STATUS, &reg)) return (s->status = SENS_ERR);
+    DBG("stat=0x%02X", reg);
+    if(reg & BMP280_STATUS_MSRNG) goto ret;
+    // OK, measurements done -> get and calculate data
+    CaliData_t *CaliData = (CaliData_t*)s->privdata;
+    uint8_t ID = CaliData->params.ID;
+    uint8_t datasz = 8; // amount of bytes to read
+    uint8_t data[8];
+    if(ID == BMP280_CHIP_ID) datasz = 6; // no humidity
+    if(!i2c_read_data8(BMP280_REG_ALLDATA, datasz, data)){
+        DBG("Can't read data");
+        return (s->status = SENS_ERR);
+    }
+    int32_t p = (data[0] << 12) | (data[1] << 4) | (data[2] >> 4);
+    DBG("puncomp = %d", p);
+    int32_t t = (data[3] << 12) | (data[4] << 4) | (data[5] >> 4);
+    DBG("tuncomp = %d", t);
+    int32_t t_fine;
+    s->data.T = compTemp(s, t, &t_fine);
+    DBG("tfine = %d", t_fine);
+    s->data.P = compPres(s, p, t_fine);
+    if(ID == BME280_CHIP_ID){
+        int32_t h = (data[6] << 8) | data[7];
+        DBG("huncomp = %d", h);
+        s->data.H = compHum(s, h, t_fine);
+    }
+    s->status = SENS_RDY;
+ret:
+    return s->status;
+}
+
+#endif
+
+static sensor_props_t s_props(sensor_t _U_ *s){
+    sensor_props_t p = {.T = 1, .P = 1};
+    return p;
+}
+
+static int s_heater(sensor_t _U_ *s, int _U_ on){
+    return FALSE;
+}
+
+sensor_t BMP580 = {
+    .name = "BMP580",
+    .address = 0x47,
+    .status = SENS_NOTINIT,
+    .init = s_init,
+    .start = s_start,
+    .heater = s_heater,
+    .process = s_process,
+    .properties = s_props,
+};

I2Csensors/BMP580.h

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+#include "i2csensorsPTH.h"
+
+extern sensor_t BMP580;

I2Csensors/CMakeLists.txt

@@ -0,0 +1,104 @@
+cmake_minimum_required(VERSION 3.9)
+set(PROJ i2csensorsPTH)
+set(MINOR_VERSION "1")
+set(MID_VERSION "1")
+set(MAJOR_VERSION "0")
+set(VERSION "${MAJOR_VERSION}.${MID_VERSION}.${MINOR_VERSION}")
+
+project(${PROJ} VERSION ${VERSION} LANGUAGES C)
+
+# default flags
+set(CMAKE_C_FLAGS "${CFLAGS} -O2 -Wno-address-of-packed-member")
+set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS}")
+set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS} -Wextra -Wall -Werror -W")
+set(CMAKE_COLOR_MAKEFILE ON)
+
+option(DEBUG "Compile in debug mode" OFF)
+option(EXAMPLES "Build examples" ON)
+
+if(DEBUG)
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Og -g3 -ggdb -Werror")
+    add_definitions(-DEBUG)
+    set(CMAKE_BUILD_TYPE DEBUG)
+    set(CMAKE_VERBOSE_MAKEFILE "ON")
+else()
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O3 -march=native -fdata-sections -ffunction-sections -flto=auto")
+#    add_definitions(-DEBUG)
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--gc-sections -flto=auto")
+    set(CMAKE_BUILD_TYPE RELEASE)
+endif()
+message("Build type: ${CMAKE_BUILD_TYPE}")
+
+aux_source_directory(${CMAKE_CURRENT_SOURCE_DIR} SOURCES)
+
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(${PROJ} REQUIRED usefull_macros)
+
+# library
+add_library(${PROJ} SHARED ${SOURCES})
+# library header files
+set(LIBHEADER "i2csensorsPTH.h")
+# -I
+include_directories(${${PROJ}_INCLUDE_DIRS})
+# -L
+link_directories(${${PROJ}_LIBRARY_DIRS})
+# -D
+add_definitions(-DPACKAGE_VERSION=\"${VERSION}\" -DMINOR_VERSION=\"${MINOR_VERSION}\"
+        -DMID_VERSION=\"${MID_VERSION}\" -DMAJOR_VERSION=\"${MAJOR_VESION}\")
+# -l
+target_link_libraries(${PROJ} ${${PROJ}_LIBRARIES})
+
+set(PCFILE "${CMAKE_BINARY_DIR}/${PROJ}.pc")
+configure_file("${PROJ}.pc.in" ${PCFILE} @ONLY)
+
+set_target_properties(${PROJ} PROPERTIES VERSION ${VERSION})
+set_target_properties(${PROJ} PROPERTIES PUBLIC_HEADER ${LIBHEADER})
+
+# Installation of the program
+include(GNUInstallDirs)
+install(TARGETS ${PROJ} LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+        PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
+install(FILES ${PCFILE} DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/pkgconfig)
+
+# EXAMPLES
+if(EXAMPLES)
+    add_subdirectory(examples)
+endif()
+
+###### gettext ######
+if(NOT DEFINED NOGETTEXT)
+    add_definitions(-DGETTEXT)
+    if(CMAKE_BUILD_TYPE STREQUAL "Debug")
+        message("Generate locale files @ make")
+        find_package(Gettext REQUIRED)
+        find_program(GETTEXT_XGETTEXT_EXECUTABLE xgettext)
+        if(NOT GETTEXT_XGETTEXT_EXECUTABLE OR NOT GETTEXT_MSGFMT_EXECUTABLE)
+            message(FATAL_ERROR "xgettext not found")
+        endif()
+        file(MAKE_DIRECTORY ${LCPATH})
+        file(MAKE_DIRECTORY ${LCPATH}/LC_MESSAGES)
+
+        add_custom_command(
+            OUTPUT ${PO_FILE}
+            WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+            COMMAND ${GETTEXT_XGETTEXT_EXECUTABLE} --from-code=koi8-r ${SOURCES} -c -k_ -kN_ -o ${PO_FILE}
+            COMMAND sed -i 's/charset=.*\\\\n/charset=koi8-r\\\\n/' ${PO_FILE}
+            COMMAND enconv ${PO_FILE}
+            DEPENDS ${SOURCES}
+        )
+        # we need this to prevent ru.po & .mo from deleting by make clean
+        add_custom_target(
+            RU_FILE
+            COMMAND [ -f ${RU_FILE} ] && ${GETTEXT_MSGMERGE_EXECUTABLE} -Uis ${RU_FILE} ${PO_FILE} || cp ${PO_FILE} ${RU_FILE}
+            DEPENDS ${PO_FILE} ${SOURCES}
+        )
+        add_custom_target(
+            MO_FILE
+            COMMAND make RU_FILE && ${GETTEXT_MSGFMT_EXECUTABLE} ${RU_FILE} -o ${MO_FILE}
+            DEPENDS ${RU_FILE}
+        )
+        add_dependencies(${PROJ} MO_FILE)
+    else() # install .mo file
+        install(FILES ${MO_FILE} DESTINATION "${LOCALEDIR}/ru/LC_MESSAGES")
+    endif()
+endif(NOT DEFINED NOGETTEXT)

I2Csensors/PCA9548

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+if [[ $# != 1 || $((-(-$1))) != $1 ]]; then
+	echo "Usage: $0 cnannel [!0-7 == all off]" >&2
+	exit 1
+fi
+
+CMD="0"
+[[ $1 -ge 0 && $1 -le 7 ]] && CMD=$((1 << $1))
+
+echo "send $CMD"
+
+i2ctransfer -y 1 w1@0x70 $CMD
+i2cdetect -y -r 1

I2Csensors/Readme.md

@@ -0,0 +1,158 @@
+Reading information from different T/P/H sensors
+================================================
+
+Supported sensors: AHT10, AHT15, AHT21b, BMP180, BMP280, BME280, SHT3x, SI7005
+
+
+
+
+| Sensor  | Precision H/T/P | Address       | Max speed | Comment |
+|---------|-----------------|---------------|-----------|---------|
+| AHT10   | 2%/0.3°/-       | 0x38/0x39     | 400k      | ADDR selects lowest address bit |
+| AHT15   | 2%/0.3°/-       | 0x38          | 400k      | what is the difference from AHT10? |
+| AHT21b  | 3%/0.5°/-       | 0x38          | 400k      | |
+| BMP180  | -/1°/12Pa       | 0x77          | 3.4M      | could also works by SPI |
+| BME280  | 3%/1°/0.2Pa     | 0x76/77       | 3.4M      | SDO allows to select lowest I2C address bit; supports SPI |
+| SHT30   | 3%/0.3°/-       | 0x44/0x45     | 1M        | SHT31 have higher humidity precision (2%); ADDR selects address lowest bit; hav ALERT pin  |
+| SI7005  | 4.5%/1°/-       | 0x40          | 400k      | ~CS can select sensor if several are on bus |
+-------------------------------------------------------------------
+
+
+## Install library
+
+1. Download: `git clone` or other way.
+2. Create building directory: `mkdir mk`. Go into it: `cd mk`.
+3. Run `cmake`: `cmake ..`.
+4. Build and install: `make && su -c "make install"`.
+
+### Cmake options
+
+Marked options are ON by default:
+
+- [ ] DEBUG - compile in debug mode;
+- [x] EXAMPLES - build also examples (they won't be installed, you can use them just in build dir).
+
+## How to use
+
+After installing library you can use it including `i2csensorsPTH.h` into your code and linking with `-l i2csensorsPTH`.
+Also you can use `pkg-config` after installing library:
+
+```
+pkg-config --libs --cflags i2csensorsPTH
+
+``` 
+
+
+### Base types
+
+#### `sensor_status_t`
+
+Status of given sensor. `SENS_NOTINIT` means that you should init device; also if you get `SENS_ERR` you should try to reinit it.
+Receiving error on init function means that there's troubles on the bus or with sensor.  
+
+```
+typedef enum{
+    SENS_NOTINIT,   // wasn't inited
+    SENS_BUSY,      // measurement in progress
+    SENS_ERR,       // error occured
+    SENS_RELAX,     // do nothing
+    SENS_RDY,       // data ready - can get it
+} sensor_status_t;
+```
+
+#### `sensor_props_t` 
+
+Properties: if the corresponding field sets, the device have this ability. `flags` allows to use all together as bit fields. 
+
+```
+typedef union{
+    struct{
+        uint8_t T   : 1; // can temperature (degC)
+        uint8_t H   : 1; // can humidity (percent)
+        uint8_t P   : 1; // can pressure (hPa)
+        uint8_t htr : 1; // have heater
+    };
+    uint32_t flags;
+} sensor_props_t;
+```
+
+#### `sensor_data_t` 
+
+Gathered data. The fields that are zeroed in sensor's properties are undefined.
+
+```
+typedef struct{
+    double T;    // temperature, degC
+    double H;    // humidity, percents
+    double P;    // pressure, hPa
+} sensor_data_t;
+```
+
+### Functions
+
+#### `int sensors_open(const char *dev)`
+
+Open I2C device by path `dev`. Returns `TRUE` if all OK.
+
+#### `void sensors_close()`
+
+Close I2C device.
+
+#### `char *sensors_list()`
+
+Returns allocated string with comma-separated names of all supported sensors. Don't forget to `free` it later.
+
+#### `sensor_t* sensor_new(const char *name)`
+
+Search `name` in list of supported sensors and, if found, returns pointer to sensors structure. Returns `NULL` if sensor not failed or some error oqqured.
+
+#### `void sensor_delete(sensor_t **s)`
+
+Delete all memory, allocated for given sensor.
+
+#### `sensor_props_t sensor_properties(sensor_t *s)`
+
+Allows to check sensor's properties.
+
+#### `int sensor_init(sensor_t *s, uint8_t address)`
+
+Try to find given sensor on the bus and run initial procedures (like calibration and so on). The `address` argument shoul be zero to use default I2C address or non-zero for custom.
+Returns `TRUE` if all OK.
+
+#### `int sensor_heater(sensor_t *s, int on)`
+
+Turn on (`on == 1`) or off (`on == 0`) sensor's heater (if sensor supported it). Returns `FALSE` if sensor don't support heater or some error occured during operations.
+
+#### `int sensor_start(sensor_t *s)`
+
+Start measurement process. While measuring, you should poll sensor until data would be ready (or you get timeout error). 
+
+#### `sensor_status_t sensor_process(sensor_t *s)`
+
+Polling sensor and gathering all data in simple finite-state machine. Checks if sensor is still busy and asks for data portion on each measuring stage. 
+Returns current sensor's state. If you get `SENS_RDY`, you can ask for data.
+
+#### `int sensor_getdata(sensor_t *s, sensor_data_t *d)`
+
+Get data into your variable `d`. Returns `FALSE` if data isn't ready (e.g. you didn't run `start` or sensor is still measuring).
+
+### I2C functions
+
+Of course, you can wish to work with I2C directly (e.g. to switch multiplexer's channel and so on), so here are some usefull functions.
+
+#### `int sensor_writeI2C(uint8_t addr, uint8_t *data, int len)`
+
+Write `data` array with len of `len` bytes with device address `addr`. Returns `FALSE` if failed.
+
+#### `int sensor_readI2C(uint8_t addr, uint8_t *data, int len)`
+
+Read `len` bytes of `data` from address `addr`. Returns `FALSE` if failed.
+
+#### `int sensor_readI2Cregs(uint8_t addr, uint8_t regaddr, uint16_t N, uint8_t *data)`
+
+Read content of `N` 8-bit registers starting from `regaddr` to array `data`. Returns `FALSE` if failed.
+
+#### `int sensor_writeI2Creg(uint8_t addr, uint8_t regaddr, uint8_t data)`
+
+Write `data` to single register `regaddr`. Returns `FALSE` if failed.
+

I2Csensors/SHT3x.c

@@ -0,0 +1,121 @@
+/*
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <usefull_macros.h>
+
+#include "SHT3x.h"
+#include "i2c.h"
+#include "sensors_private.h"
+
+// use single mode with high repeatability
+static uint8_t cmd_measure[]          = { 0x24, 0x00 };
+static uint8_t cmd_reset[]            = { 0x30, 0xa2 };
+static uint8_t cmd_break[]            = { 0x30, 0x93 };
+static uint8_t cmd_heater_on[]        = { 0x30, 0x6d };
+static uint8_t cmd_heater_off[]       = { 0x30, 0x66 };
+//static uint8_t cmd_read_status_reg[]  = { 0xf3, 0x2d };
+static uint8_t cmd_clear_status_reg[] = { 0x30, 0x41 };
+
+// maybe usefull to read heater status
+//#define SHT31_REG_HEATER_BIT 0x0d
+
+// documented timeout is 15ms, so let's wait 20
+#define MEASUREMENT_TIMEOUT     (0.02)
+
+static int s_init(sensor_t *s){
+    s->status = SENS_NOTINIT;
+    if(!i2c_write_raw(cmd_break, 2)){
+        DBG("Can't break old measurements");
+        return FALSE;
+    }
+    if(!i2c_write_raw(cmd_reset, 2)){
+        DBG("Can't make soft reset");
+        return FALSE;
+    }
+    if(!i2c_write_raw(cmd_clear_status_reg, 2)){
+        DBG("Can't clear status bits");
+        return FALSE;
+    }
+    if(!s->privdata) s->privdata = calloc(1, sizeof(double)); // used for start measurement time
+    s->status = SENS_RELAX;
+    return TRUE;
+}
+
+static int s_start(sensor_t *s){
+    if(s->status != SENS_RELAX) return FALSE;
+    s->status = SENS_BUSY;
+    if(!i2c_write_raw(cmd_measure, 2)){
+        DBG("Can't write start Tmeas");
+        s->status = SENS_ERR;
+        return FALSE;
+    }
+    *((double*)s->privdata) = sl_dtime();
+    return TRUE;
+}
+
+static uint8_t crc8(const uint8_t *data, int len){
+    uint8_t POLYNOMIAL = 0x31;
+    uint8_t crc = 0xFF;
+    for(int j = len; j; --j){
+        crc ^= *data++;
+        for(int i = 8; i; --i) crc = (crc & 0x80) ? (crc << 1) ^ POLYNOMIAL : (crc << 1);
+    }
+    return crc;
+}
+
+
+static sensor_status_t s_process(sensor_t *s){
+    if(s->status != SENS_BUSY) return s->status;
+    uint8_t data[6];
+    int ans = i2c_read_raw(data, 6);
+    if(sl_dtime() - *((double*)s->privdata) < MEASUREMENT_TIMEOUT){
+       if(!ans) return s->status; // poll ACK
+    }
+    if(!ans) return (s->status = SENS_ERR); // timeout!
+    i2c_write_raw(cmd_clear_status_reg, 2); // need to write any command or sensor will widthraw into itself
+    if(data[2] != crc8(data, 2) || data[5] != crc8(data + 3, 2)) return (s->status = SENS_ERR); // CRC error
+    int32_t stemp = (int32_t)(((uint32_t)data[0] << 8) | data[1]);
+    stemp = ((4375 * stemp) >> 14) - 4500;
+    s->data.T = stemp / 100.;
+    uint32_t shum = ((uint32_t)data[3] << 8) | data[4];
+    shum = (625 * shum) >> 12;
+    s->data.H = shum / 100.0;
+    return (s->status = SENS_RDY);
+}
+
+static sensor_props_t s_props(sensor_t _U_ *s){
+    sensor_props_t p = {.T = 1, .H = 1};
+    return p;
+}
+
+static int s_heater(sensor_t _U_ *s, int on){
+    uint8_t *cmd = (on) ? cmd_heater_on : cmd_heater_off;
+    if(!i2c_write_raw(cmd, 2)) return FALSE;
+    return TRUE;
+}
+
+sensor_t SHT3x = {
+    .name = "SHT3x",
+    .address = 0x44,
+    .status = SENS_NOTINIT,
+    .init = s_init,
+    .start = s_start,
+    .heater = s_heater,
+    .process = s_process,
+    .properties = s_props,
+};

I2Csensors/SHT3x.h

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "i2csensorsPTH.h"
+
+extern sensor_t SHT3x;

I2Csensors/SI7005.c

@@ -0,0 +1,139 @@
+/*
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <usefull_macros.h>
+
+#include "i2c.h"
+#include "sensors_private.h"
+#include "SI7005.h"
+
+#define SI7005_REGSTATUS    0
+#define SI7005_STATUSNRDY   1
+#define SI7005_REGDATA      1
+#define SI7005_REGCONFIG    3
+#define SI7005_CONFFAST     (1<<5)
+#define SI7005_CONFTEMP     (1<<4)
+#define SI7005_CONFHEAT     (1<<1)
+#define SI7005_CONFSTART    (1<<0)
+#define SI7005_REGID        0x11
+
+#define SI7005_ID           0x50
+
+static int s_init(sensor_t *s){
+    uint8_t ID;
+    s->status = SENS_NOTINIT;
+    if(!i2c_read_reg8(SI7005_REGID, &ID)){
+        DBG("Can't read SI_REG_ID");
+        return FALSE;
+    }
+    DBG("SI, device ID: 0x%02x", ID);
+    if(ID != SI7005_ID){
+        DBG("Not SI7005\n");
+        return FALSE;
+    }
+    s->status = SENS_RELAX;
+    return TRUE;
+}
+
+static int s_start(sensor_t *s){
+    if(s->status != SENS_RELAX) return FALSE;
+    s->status = SENS_BUSY;
+    if(!i2c_write_reg8(SI7005_REGCONFIG, SI7005_CONFTEMP | SI7005_CONFSTART)){
+        DBG("Can't write start Tmeas");
+        s->status = SENS_ERR;
+        return FALSE;
+    }
+    DBG("Wait for T\n");
+    return TRUE;
+}
+
+// start humidity measurement
+static sensor_status_t si7005_cmdH(sensor_t *s){
+    s->status = SENS_BUSY;
+    if(!i2c_write_reg8(SI7005_REGCONFIG, SI7005_CONFSTART)){
+        DBG("Can't write start Hmeas");
+        return (s->status = SENS_ERR);
+    }
+    DBG("Wait for H");
+    return s->status;
+}
+
+static sensor_status_t s_process(sensor_t *s){
+    uint8_t c, d[3];
+    if(s->status != SENS_BUSY) return s->status;
+    if(!i2c_read_raw(d, 3)){
+        DBG("Can't read status");
+        return (s->status = SENS_ERR);
+    }
+    //DBG("Status: 0x%02x, H: 0x%02x, L: 0x%02x", d[0], d[1], d[2]);
+    if(!i2c_read_reg8(SI7005_REGCONFIG, &c)){
+        DBG("Can't read config");
+        return (s->status = SENS_ERR);
+    }
+    //DBG("Config: 0x%02x", c);
+    if(d[0] & SI7005_STATUSNRDY){ // not ready yet
+        return s->status;
+    }
+    uint16_t TH = (uint16_t)((d[1]<<8) | d[2]);
+    if(c & SI7005_CONFTEMP){ // temperature measured
+        TH >>= 2;
+        double Tmeasured = TH/32. - 50.;
+        DBG("T=%.2f", Tmeasured);
+        s->data.T = Tmeasured;
+        return si7005_cmdH(s);
+    }else{ // humidity measured
+// correct T/H
+#define A0 (-4.7844)
+#define A1 (0.4008)
+#define A2 (-0.00393)
+        TH >>= 4;
+        double Hmeasured = TH/16.f - 24.f;
+        DBG("H=%.1f", Hmeasured);
+        s->data.H = Hmeasured - (A2*Hmeasured*Hmeasured + A1*Hmeasured + A0);
+        s->status = SENS_RDY;
+    }
+    return s->status;
+}
+
+// turn heater on/off (1/0)
+static int s_heater(sensor_t *s, int on){
+    DBG("status=%d", s->status);
+    if(s->status != SENS_RELAX) return FALSE;
+    uint8_t reg = (on) ? SI7005_CONFHEAT : 0;
+    if(!i2c_write_reg8(SI7005_REGCONFIG, reg)){
+        DBG("Can't write regconfig");
+        return FALSE;
+    }
+    return TRUE;
+}
+
+static sensor_props_t s_props(sensor_t _U_ *s){
+    sensor_props_t p = {.T = 1, .H = 1, .htr = 1};
+    return p;
+}
+
+sensor_t SI7005 = {
+    .name = "SI7005",
+    .address = 0x40,
+    .status = SENS_NOTINIT,
+    .init = s_init,
+    .start = s_start,
+    .heater = s_heater,
+    .process = s_process,
+    .properties = s_props,
+};

I2Csensors/SI7005.h

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+#include "i2csensorsPTH.h"
+
+extern sensor_t SI7005;

I2Csensors/aht.c

@@ -0,0 +1,191 @@
+/*
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <usefull_macros.h>
+
+#include "aht.h"
+#include "i2c.h"
+#include "sensors_private.h"
+
+enum{
+    ISAHT1x,
+    ISAHT2x
+};
+
+#define AHT_CMD_INITIALIZE      0xE1
+#define AHT_CMD_MEASURE         0xAC
+#define AHT_CMD_SOFT_RESET      0xBA
+// status - for AHT21
+#define AHT_CMD_STATUS          0x71
+// init command bits:
+// normal/cycle/command modes (bits 6:5) [non-documented!]:
+#define AHT_INIT_NORMAL_MODE    0x00
+#define AHT_INIT_CYCLE_MODE     0x20
+#define AHT_INIT_CMD_MODE       0x40
+// run calibration
+#define AHT_INIT_CAL_ON         0x08
+// zero byte for INIT/START cmd
+#define AHT_NOP                 0
+// measurement control [non-documented!]
+#define AHT_MEAS_CTRL           0x33
+// status bits
+#define AHT_STATUS_BUSY         0x80
+#define AHT_STATUS_NORMAL_MODE  0x00
+#define AHT_STATUS_CYCLE_MODE   0x20
+#define AHT_STATUS_CMD_MODE     0x40
+#define AHT_STATUS_CAL_ON       0x08
+// status bits for AHT2x (both should be ones, or init again)
+#define AHT_STATUS_CHK          0x18
+
+// max reset time
+#define RST_TIME                (20e-3)
+// max data waiting time
+#define DATA_TIME               (75e-3)
+
+static sensor_status_t s_poll(){
+    uint8_t b;
+    if(!i2c_read_raw(&b, 1)) return SENS_ERR;
+#ifdef EBUG
+    if(b & AHT_STATUS_BUSY) printf("BUSY ");
+    static const char *modes[] = {"NOR", "CYC", "CMD", "CMD"};
+    printf("MODE=%s ", modes[(b >> 6)&3]);
+    printf("%sCALIBRATED\n", b & AHT_STATUS_CAL_ON ? "" : "NOT ");
+#endif
+    if(b & AHT_STATUS_BUSY) return SENS_BUSY;
+    return SENS_RELAX;
+}
+
+static int s_init(sensor_t *s){
+    s->status = SENS_NOTINIT;
+    if(!i2c_write_reg8(AHT_CMD_SOFT_RESET, 0)){
+        DBG("Can't reset");
+        return FALSE;
+    }
+    double t0 = sl_dtime(), t;
+    while((t = sl_dtime()) - t0 < RST_TIME){
+        if(SENS_RELAX == s_poll()) break;
+        usleep(1000);
+    }
+    if(t - t0 > RST_TIME) return SENS_ERR;
+    DBG("Reseted");
+    uint8_t data[3] = {AHT_CMD_INITIALIZE, AHT_INIT_CAL_ON, AHT_NOP};
+    if(!i2c_write_raw(data, 3)){
+        DBG("Can't init");
+        return FALSE;
+    }
+    t0 = sl_dtime();
+    while((t = sl_dtime()) - t0 < RST_TIME){
+        if(SENS_RELAX == s_poll()) break;
+        usleep(1000);
+    }
+    if(t - t0 > RST_TIME) return SENS_ERR;
+    DBG("Inited");
+    s->status = SENS_RELAX;
+    return TRUE;
+}
+
+static int s_start(sensor_t *s){
+    if(s->status != SENS_RELAX) return FALSE;
+    uint8_t data[3] = {AHT_CMD_MEASURE, AHT_MEAS_CTRL, AHT_NOP};
+    // the only difference between AHT1x and AHT2x
+    if(s->private == ISAHT2x){ // check status
+        uint8_t b;
+        if(!i2c_read_reg8(AHT_CMD_STATUS, &b)) return FALSE;
+        if((b & AHT_STATUS_CHK) != AHT_STATUS_CHK){
+            DBG("need init");
+            if(!s->init(s)) return FALSE;
+        }
+    }
+    if(!i2c_write_raw(data, 3)){
+        DBG("Can't start measuring");
+        return FALSE;
+    }
+    DBG("Start @ %.3f", sl_dtime());
+    return TRUE;
+}
+
+static sensor_status_t s_process(sensor_t *s){
+    sensor_status_t st = s_poll();
+    if(st != SENS_RELAX) return (s->status = st);
+    uint8_t data[6];
+    if(!i2c_read_raw(data, 6)) return (s->status = SENS_ERR);
+    DBG("Got @ %.3f", sl_dtime());
+    uint32_t rawH = ((uint32_t)data[1] << 12) | ((uint32_t)data[2] << 4) | (data[3] >> 4);
+    uint32_t rawT = ((uint32_t)(data[3] & 0x0F) << 16) | ((uint32_t)data[4] << 8) | data[5];
+    DBG("rawH=%d, rawT=%d", rawH, rawT);
+    s->data.T = rawT * 200.0 / 1048576.0 - 50.0;
+    s->data.H = rawH * 100.0 / 1048576.0;
+    return (s->status = SENS_RDY);
+}
+
+static sensor_props_t s_props(sensor_t _U_ *s){
+    sensor_props_t p = {.T = 1, .H = 1};
+    return p;
+}
+
+static int s_heater(sensor_t _U_ *s, int _U_ on){
+    return FALSE;
+}
+
+sensor_t AHT10 = {
+    .name = "AHT10",
+    .private = ISAHT1x,
+    .address = 0x38,
+    .status = SENS_NOTINIT,
+    .init = s_init,
+    .start = s_start,
+    .heater = s_heater,
+    .process = s_process,
+    .properties = s_props,
+};
+
+sensor_t AHT15 = {
+    .name = "AHT15",
+    .private = ISAHT1x,
+    .address = 0x38,
+    .status = SENS_NOTINIT,
+    .init = s_init,
+    .start = s_start,
+    .heater = s_heater,
+    .process = s_process,
+    .properties = s_props,
+};
+
+sensor_t AHT20 = {
+    .name = "AHT20",
+    .private = ISAHT2x,
+    .address = 0x38,
+    .status = SENS_NOTINIT,
+    .init = s_init,
+    .start = s_start,
+    .heater = s_heater,
+    .process = s_process,
+    .properties = s_props,
+};
+
+sensor_t AHT21 = {
+    .name = "AHT21",
+    .private = ISAHT2x,
+    .address = 0x38,
+    .status = SENS_NOTINIT,
+    .init = s_init,
+    .start = s_start,
+    .heater = s_heater,
+    .process = s_process,
+    .properties = s_props,
+};

I2Csensors/aht.h

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "i2csensorsPTH.h"
+
+extern sensor_t AHT10;
+extern sensor_t AHT15;
+extern sensor_t AHT20;
+extern sensor_t AHT21;

I2Csensors/common_table

@@ -0,0 +1,16 @@
+Датчики влажности[-температуры[-давления]]
+
+# датчик = паспортная точность по влажности/температуре/давлению = доступные ID = максимальная скорость = примечание
+AM2320  = 3%/0.5°/-     = 0x5C          = 100k* = (*) модбас (!!!) поверх I2C; желательно питать 5В, хоть вроде должен и от 3.3
+AHT10   = 2%/0.3°/-     = 0x38/0x39     = 400k  = ADDR выбирает младший бит
+AHT15   = 2%/0.3°/-     = 0x38          = 400k  = непонятно, чем от 10 отличается
+AHT21b  = 3%/0.5°/-     = 0x38          = 400k  =
+BMP180  = -/1°/12Pa     = 0x77          = 3.4M  = есть вариант с SPI, но не в общем случае
+BME280  = 3%/1°/0.2Pa   = 0x76/77       = 3.4M  = выбор младшего бита ногой SDO, есть SPI
+HTU21d  = 3-5%/0.3°/-   = 0x40          = 400k  = в зависимости от маркировки точность 3-5%RH, бывают ШИМ и др. интерфейсы 
+HTU32d  = 2%/0.2°/-     = 0x40/0x41     = 10M   = младший бит адреса выбирается ногой ADDR 
+SHT30   = 3%/0.3°/-     = 0x44/0x45     = 1M    = у SHT31 заявленная точность по влажности: 2%; младший бит адреса выбирается ногой ADDR; есть программируемая нога ALERT!
+SHT4x   = *             = 0x44/0x45**    (*) 40: 2-4%/>0.2-0.4°, 41: 2-2.5%/0.2-0.4°, 45: 1-2%/0.1-0.3°; (**) адрес зависит от маркировки (A/B); есть нагреватель; есть команда reset (0x06) по адресу 0   
+SI7005  = 4.5%/1°/-     = 0x40          = 400k  = возможен выбор с помощью ноги ~CS
+
+SHT85?

I2Csensors/examples/CMakeLists.txt

@@ -0,0 +1,8 @@
+cmake_minimum_required(VERSION 3.9)
+
+include_directories(..)
+link_libraries(i2csensorsPTH usefull_macros -lm)
+
+add_executable(single single_sensor.c)
+add_executable(log logmany.c)
+#target_link_libraries(single i2csensorsPTH usefull_macros)

I2Csensors/examples/MAP

@@ -0,0 +1,8 @@
+0 - AHT15 (38), SI7005 (40)
+1 - AHT10 (38), BMP180 (77), BME280 (76)
+2 - BME280 (76), AHT21b (38), SHT30 (44)
+3 - AHT+BMP (38, 77), /* HTU21d (40) */
+4 - AHT+BMP (38, 77), /* SHT40 (44) */
+5 - AHT+BMP (38, 77), BMP580 (47)
+6 - MTU31 (40), BMP580 (47), BME280 (76)
+7 - AM2320 (56)

I2Csensors/examples/Readme.md

@@ -0,0 +1,35 @@
+# Examples of library usage
+
+### logmany.c
+
+Creates executable `log`. The purpose of this is to show how you can use library wit lots of sensors (even with fully similar)
+divided by groups (to prevent same addresses on one bus) switching by PCA9548A.
+
+Usage:
+```
+  -H, --hlog=arg       humidity logging file
+  -P, --plog=arg       pressure logging file
+  -T, --tlog=arg       temperature logging file
+  -a, --muladdr=arg    multiplexer I2C address
+  -d, --device=arg     I2C device path
+  -h, --help           show this help
+  -i, --interval=arg   logging interval, seconds (default: 10)
+  -m, --presmm         pressure in mmHg instead of hPa
+```
+
+### single_sensor.c
+
+Creates executable `single`. Open single sensor and show its parameters.
+
+Usage:
+
+```
+  -H, --heater=arg    turn on/off heater (if present)
+  -a, --address=arg   sensor's address (if not default)
+  -d, --device=arg    I2C device path
+  -h, --help          show this help
+  -l, --list          list all supported sensors
+  -m, --presmm        pressure in mmHg instead of hPa
+  -s, --sensor=arg    sensor's name
+
+```

I2Csensors/examples/logmany.c

@@ -0,0 +1,240 @@
+/*
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <math.h> // for NaN
+#include <signal.h>
+#include <stdio.h>
+#include <strings.h>
+#include <unistd.h>
+#include <usefull_macros.h>
+
+#include "i2csensorsPTH.h"
+
+typedef struct{
+    char *device;
+    char *Tlog;
+    char *Hlog;
+    char *Plog;
+    double interval;
+    int mul_addr;
+    int presmm;     // pressure in mm instead of hPa
+    int help;
+} glob_pars;
+
+static glob_pars G = {
+    .device = "/dev/i2c-1",
+    .mul_addr = 0x70,
+    .interval = 10.,
+};
+
+static sl_option_t cmdlnopts[] = {
+    {"help",    NO_ARGS,    NULL,   'h',    arg_int,    APTR(&G.help),      "show this help"},
+    {"device",  NEED_ARG,   NULL,   'd',    arg_string, APTR(&G.device),    "I2C device path"},
+    {"presmm",  NO_ARGS,    NULL,   'm',    arg_int,    APTR(&G.presmm),    "pressure in mmHg instead of hPa"},
+    {"tlog",    NEED_ARG,   NULL,   'T',    arg_string, APTR(&G.Tlog),      "temperature logging file"},
+    {"hlog",    NEED_ARG,   NULL,   'H',    arg_string, APTR(&G.Hlog),      "humidity logging file"},
+    {"plog",    NEED_ARG,   NULL,   'P',    arg_string, APTR(&G.Plog),      "pressure logging file"},
+    {"interval",NEED_ARG,   NULL,   'i',    arg_double, APTR(&G.interval),  "logging interval, seconds (default: 10)"},
+    {"muladdr", NEED_ARG,   NULL,   'a',    arg_int,    APTR(&G.mul_addr),  "multiplexer I2C address"},
+    end_option
+};
+
+static FILE *tlogf = NULL, *hlogf = NULL, *plogf = NULL;
+
+static FILE *openlog(const char *name){
+    FILE *l = fopen(name, "w");
+    if(!l) ERR("Can't open %s", name);
+    return l;
+}
+
+void signals(int s){
+    DBG("Got sig %d", s);
+    sensors_close();
+    if(tlogf != stdout) fclose(tlogf);
+    if(hlogf != stdout) fclose(hlogf);
+    if(plogf != stdout) fclose(plogf);
+    exit(s);
+}
+
+typedef struct{
+    const char *name;   // name - for header in log
+    const char *type;   // sensor's name for `sensor_new`
+    uint8_t nch;        // channel number
+    uint8_t address;    // address (0 for default)
+    sensor_t *sensor;   // pointer to sensor itself
+} sd_t;
+
+// amount of all sensors connected
+#define SENSORS_AMOUNT  17
+
+// list of sensors - must be sorted by channel number
+static sd_t all_sensors[SENSORS_AMOUNT] = {
+    {.name = "AHT15", .type = "AHT15", .nch = 0},
+    {.name = "SI7005", .type = "SI7005", .nch = 0},
+    {.name = "AHT10", .type = "AHT10", .nch = 1},
+    {.name = "BMP180", .type = "BMP180", .nch = 1},
+    {.name = "BME280A", .type = "BME280", .nch = 1},
+    {.name = "BME280B", .type = "BME280", .nch = 2},
+    {.name = "AHT21", .type = "AHT21", .nch = 2},
+    {.name = "SHT30", .type = "SHT3x", .nch = 2},
+    {.name = "AHT20A", .type = "AHT21", .nch = 3},
+    {.name = "BMP280A", .type = "BMP280", .nch = 3, .address = 0x77},
+    {.name = "AHT20B", .type = "AHT20", .nch = 4},
+    {.name = "BMP280B", .type = "BMP280", .nch = 4, .address = 0x77},
+    {.name = "AHT20C", .type = "AHT20", .nch = 5},
+    {.name = "BMP280C", .type = "BMP280", .nch = 5, .address = 0x77},
+    {.name = "BMP580A", .type = "BMP580", .nch = 5},
+   // {.name = "MTU31", .type = "MTU31", .nch = 6},
+    {.name = "BMP580B", .type = "BMP580", .nch = 6},
+    {.name = "BME280C", .type = "BME280", .nch = 6},
+    // {.name = "AM2320", .type = "AM2320", .nch = 7},
+};
+/*
+static int chsort(const void *v1, const void *v2){
+    const sd_t *s1 = (const sd_t*)v1;
+    const sd_t *s2 = (const sd_t*)v2;
+    return s1->nch - s2->nch;
+}*/
+
+
+static int setchan(uint8_t N){
+    if(N > 7){ WARNX("Wrong channel number: %d", N); return FALSE; }
+    N = 1<<N;
+    int r = sensor_writeI2C(G.mul_addr, &N, 1);
+    if(!r) return FALSE;
+    usleep(100); // wait for commutation
+    return TRUE;
+}
+
+static void wrnames(FILE*f, uint32_t p){
+    for(int i = 0; i < SENSORS_AMOUNT; ++i){
+        sensor_props_t sp = sensor_properties(all_sensors[i].sensor);
+        if((sp.flags & p) == 0) continue;
+        fprintf(f, "%s\t", all_sensors[i].name);
+    }
+    fprintf(f, "\n");
+}
+
+static void writeheader(){
+    sensor_props_t p;
+    fprintf(tlogf, "# Temperature, degC\n");
+    p.flags = 0; p.T = 1; wrnames(tlogf, p.flags);
+    fprintf(hlogf, "# Humidity, percent\n");
+    p.flags = 0; p.H = 1; wrnames(hlogf, p.flags);
+    fprintf(plogf, "# Pressure, %s\n", G.presmm ? "mmHg" : "hPa");
+    p.flags = 0; p.P = 1; wrnames(plogf, p.flags);
+}
+
+static void initsensors(){
+    uint8_t curch = 8;
+    for(int i = 0; i < SENSORS_AMOUNT; ++i){
+        uint8_t ch = all_sensors[i].nch;
+        if(ch != curch){
+            if(!setchan(ch)) ERRX("Error selecting channel %d", ch);
+            curch = ch;
+        }
+        if(!(all_sensors[i].sensor = sensor_new(all_sensors[i].type))) ERRX("Can't connect %s", all_sensors[i].name);
+        if(!sensor_init(all_sensors[i].sensor, all_sensors[i].address)) ERRX("Can't init %s", all_sensors[i].name);
+    }
+}
+
+
+static void writedata(uint8_t *got){
+    if(!got) return;
+    int NT = 0, NH = 0, NP = 0;
+    static const double nan = NAN;
+    for(int i = 0; i < SENSORS_AMOUNT; ++i){
+        sensor_props_t sp = sensor_properties(all_sensors[i].sensor);
+        sensor_data_t D;
+        if(got[i] && !sensor_getdata(all_sensors[i].sensor, &D)) got[i] = 0;
+        if(sp.T){ ++NT; fprintf(tlogf, "%.2f\t", got[i] ? D.T : nan); }
+        if(sp.H){ ++NH; fprintf(hlogf, "%.2f\t", got[i] ? D.H : nan); }
+        if(sp.P){ ++NP; fprintf(plogf, "%.2f\t", got[i] ? (G.presmm ? D.P * 0.750062 : D.P) : nan); }
+    }
+    DBG("Measured: %d T, %d H and %d P", NT, NH, NP);
+    if(NT){ fprintf(tlogf, "\n"); fflush(tlogf); }
+    if(NH){ fprintf(hlogf, "\n"); fflush(hlogf); }
+    if(NP){ fprintf(plogf, "\n"); fflush(plogf); }
+}
+
+static void startlogs(){
+    double t0 = sl_dtime();
+    uint8_t *started = MALLOC(uint8_t, SENSORS_AMOUNT);
+    uint8_t *got = MALLOC(uint8_t, SENSORS_AMOUNT);
+    uint8_t curch = 8;
+    while(1){
+        bzero(started, SENSORS_AMOUNT);
+        bzero(got, SENSORS_AMOUNT);
+        int Ngot = 0;
+        double t;
+        do{
+            for(int i = 0; i < SENSORS_AMOUNT; ++i){
+                if(got[i]) continue;
+                uint8_t ch = all_sensors[i].nch;
+                if(ch != curch){
+                    if(!setchan(ch)){
+                        WARNX("Error selecting channel %d", ch);
+                        break;
+                    }
+                    else curch = ch;
+                }
+                if(!started[i]){
+                    if(sensor_start(all_sensors[i].sensor)) started[i] = 1;
+                    else WARNX("Can't start %s", all_sensors[i].name);
+                }
+                sensor_status_t sstat = sensor_process(all_sensors[i].sensor);
+                if(sstat == SENS_RDY){ got[i] = 1; ++Ngot; }
+            }
+        }while(Ngot != SENSORS_AMOUNT && sl_dtime() - t0 < G.interval);
+        if(Ngot != SENSORS_AMOUNT){ // try to reset bad sensors
+            for(int i = 0; i < SENSORS_AMOUNT; ++i){
+                if(got[i]) continue;
+                DBG("TRY TO INIT bad sensor #%d (%s)", i, all_sensors[i].name);
+                sensor_init(all_sensors[i].sensor, all_sensors[i].address);
+            }
+        }
+        if(Ngot) writedata(got);
+        while((t = sl_dtime()) - t0 < G.interval) usleep(1000);
+        t0 = t;
+    }
+}
+
+int main(int argc, char **argv){
+    sl_init();
+    sl_parseargs(&argc, &argv, cmdlnopts);
+    if(G.help) sl_showhelp(-1, cmdlnopts);
+    if(G.interval < 1.) ERRX("Interval should be >=1s");
+    if(G.mul_addr < 1 || G.mul_addr > 0x7f) ERRX("Wrong multiplexer address");
+    if(G.Tlog) tlogf = openlog(G.Tlog);
+    else tlogf = stdout;
+    if(G.Hlog) hlogf = openlog(G.Hlog);
+    else hlogf = stdout;
+    if(G.Plog) plogf = openlog(G.Plog);
+    else plogf = stdout;
+    if(!sensors_open(G.device)) ERRX("Can't open device %s", G.device);
+    signal(SIGINT, signals);
+    signal(SIGQUIT, signals);
+    signal(SIGABRT, signals);
+    signal(SIGTERM, signals);
+    signal(SIGHUP, SIG_IGN);
+    signal(SIGTSTP, SIG_IGN);
+    initsensors();
+    writeheader();
+    startlogs();
+    signals(0);
+    return 0; // never reached
+}

I2Csensors/examples/single_sensor.c

@@ -0,0 +1,121 @@
+/*
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <usefull_macros.h>
+
+#include "i2csensorsPTH.h"
+
+typedef struct{
+    char *device;
+    char *sensor;
+    int slaveaddr;
+    int list;
+    int presmm;     // pressure in mm instead of hPa
+    int help;
+    int heater;     // turn on/off heater (if present)
+} glob_pars;
+
+static glob_pars G = {
+    .device = "/dev/i2c-6",
+    .heater = -1,
+};
+
+static sl_option_t cmdlnopts[] = {
+    {"help",    NO_ARGS,    NULL,   'h',    arg_int,    APTR(&G.help),      "show this help"},
+    {"device",  NEED_ARG,   NULL,   'd',    arg_string, APTR(&G.device),    "I2C device path"},
+    {"address", NEED_ARG,   NULL,   'a',    arg_int,    APTR(&G.slaveaddr), "sensor's address (if not default)"},
+    {"sensor",  NEED_ARG,   NULL,   's',    arg_string, APTR(&G.sensor),    "sensor's name"},
+    {"list",    NO_ARGS,    NULL,   'l',    arg_int,    APTR(&G.list),      "list all supported sensors"},
+    {"presmm",  NO_ARGS,    NULL,   'm',    arg_int,    APTR(&G.presmm),    "pressure in mmHg instead of hPa"},
+    {"heater",  NEED_ARG,   NULL,   'H',    arg_int,    APTR(&G.heater),    "turn on/off heater (if present)"},
+    end_option
+};
+
+static int start(sensor_t *s, uint8_t addr){
+    if(!sensor_init(s, addr)){
+        WARNX("Can't init sensor");
+        return FALSE;
+    }
+    if(!sensor_start(s)){
+        WARNX("Can't start measurements");
+        return FALSE;
+    }
+    return TRUE;
+}
+
+static int printdata(sensor_t *s){
+    sensor_data_t D;
+    if(!sensor_getdata(s, &D)){
+        WARNX("Can't read data, try again");
+        if(!sensor_start(s)) WARNX("Oops: can't start");
+        return FALSE;
+    }
+    sensor_props_t props = sensor_properties(s);
+    if(props.T) printf("T=%.2f\n", D.T);
+    if(props.H) printf("H=%.2f\n", D.H);
+    if(props.P){
+        if(G.presmm) D.P *= 0.750062;
+        printf("P=%.1f\n", D.P);
+    }
+    return TRUE;
+}
+
+int main(int argc, char **argv){
+    sl_init();
+    sl_parseargs(&argc, &argv, cmdlnopts);
+    if(G.help) sl_showhelp(-1, cmdlnopts);
+    if(G.list){
+        char *l = sensors_list();
+        green("\nSupported sensors:\n");
+        printf("%s\n\n", l);
+        FREE(l);
+        return 0;
+    }
+    if(!G.sensor) ERRX("Point sensor's name");
+    if(G.slaveaddr && (G.slaveaddr < 8 || G.slaveaddr > 0x77)) ERRX("I2C address should be 7-bit and not forbidden");
+    if(!sensors_open(G.device)) ERR("Can't open %s", G.device);
+    sensor_t* s = sensor_new(G.sensor);
+    if(!s){ WARNX("Can't find sensor `%s` in supported list", G.sensor); goto clo; }
+    if(G.heater > -1){
+        sensor_props_t props = sensor_properties(s);
+        if(props.htr){
+            if(!sensor_init(s, G.slaveaddr)) ERRX("Can't init device");
+            if(!sensor_heater(s, G.heater)) WARNX("Cant run heater command");
+            else green("Heater is %s\n", G.heater ? "on" : "off");
+        }else ERRX("The sensor have no heater");
+        return 0;
+    }
+    if(!start(s, G.slaveaddr)) goto clo;
+    while(1){
+        sensor_status_t status = sensor_process(s);
+        if(status == SENS_RDY){ // data ready - get it
+            if(!printdata(s)) continue;
+            break;
+        }else if(status == SENS_ERR){
+            WARNX("Error in measurement, try again");
+            if(!start(s, G.slaveaddr)) break;
+        }
+        usleep(10000);
+    }
+    sensor_delete(&s);
+
+clo:
+    sensors_close();
+    return 0;
+}

I2Csensors/i2c.c

@@ -0,0 +1,233 @@
+/*
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <asm/ioctl.h>
+#include <linux/i2c.h>
+#include <linux/i2c-dev.h>
+#include <usefull_macros.h>
+
+static uint8_t lastaddr = 0;
+static int I2Cfd = -1;
+
+// common function for raw read or write
+static int i2c_rw(uint8_t *data, int len, uint16_t flags){
+    struct i2c_msg m;
+    struct i2c_rdwr_ioctl_data x = {.msgs = &m, .nmsgs = 1};
+    m.addr = lastaddr;
+    m.flags = flags; // 0 for w and I2C_M_RD for read
+    m.len = len;
+    m.buf = data;
+    DBG("write %d with len %d", *data, len);
+    if(ioctl(I2Cfd, I2C_RDWR, &x) < 0){
+        DBG("i2c_rw, ioctl()");
+        return FALSE;
+    }
+    return TRUE;
+}
+
+int i2c_write_raw(uint8_t *data, int len){
+    if(!data || I2Cfd < 1 || len < 1) return FALSE;
+    return i2c_rw(data, len, 0);
+}
+int i2c_read_raw(uint8_t *data, int len){
+    if(!data || I2Cfd < 1 || len < 1) return FALSE;
+    return i2c_rw(data, len, I2C_M_RD);
+}
+
+/**
+ * @brief i2c_read_reg8 - read 8-bit addressed register (8 bit)
+ * @param regaddr - register address
+ * @param data - data read
+ * @return state
+ */
+int i2c_read_reg8(uint8_t regaddr, uint8_t *data){
+    if(I2Cfd < 1) return FALSE;
+    struct i2c_smbus_ioctl_data args;
+    union i2c_smbus_data sd;
+    args.read_write = I2C_SMBUS_READ;
+    args.command    = regaddr;
+    args.size       = I2C_SMBUS_BYTE_DATA;
+    args.data       = &sd;
+    if(ioctl(I2Cfd, I2C_SMBUS, &args) < 0){
+        WARN("i2c_read_reg8, ioctl()");
+        return FALSE;
+    }
+    if(data) *data = sd.byte;
+    return TRUE;
+}
+
+/**
+ * @brief i2c_write_reg8 - write to 8-bit addressed register
+ * @param regaddr - address
+ * @param data - data
+ * @return state
+ */
+int i2c_write_reg8(uint8_t regaddr, uint8_t data){
+    if(I2Cfd < 1) return FALSE;
+    struct i2c_smbus_ioctl_data args;
+    union i2c_smbus_data sd;
+    sd.byte = data;
+    args.read_write = I2C_SMBUS_WRITE;
+    args.command    = regaddr;
+    args.size       = I2C_SMBUS_BYTE_DATA;
+    args.data       = &sd;
+    if(ioctl(I2Cfd, I2C_SMBUS, &args) < 0){
+        WARN("i2c_write_reg8, ioctl()");
+        return FALSE;
+    }
+    return TRUE;
+}
+
+/**
+ * @brief i2c_read_reg16 - read 16-bit addressed register (to 16-bit data)
+ * @param regaddr - address
+ * @param data - data
+ * @return state
+ */
+int i2c_read_reg16(uint16_t regaddr, uint16_t *data){
+    if(I2Cfd < 1) return FALSE;
+    struct i2c_msg m[2];
+    struct i2c_rdwr_ioctl_data x = {.msgs = m, .nmsgs = 2};
+    m[0].addr = lastaddr; m[1].addr = lastaddr;
+    m[0].flags = 0;
+    m[1].flags = I2C_M_RD;
+    m[0].len = 2; m[1].len = 2;
+    uint8_t a[2], d[2] = {0};
+    a[0] = regaddr >> 8;
+    a[1] = regaddr & 0xff;
+    m[0].buf = a; m[1].buf = d;
+    if(ioctl(I2Cfd, I2C_RDWR, &x) < 0){
+        WARN("i2c_read_reg16, ioctl()");
+        return FALSE;
+    }
+    if(data) *data = (uint16_t)((d[0] << 8) | (d[1]));
+    return TRUE;
+}
+
+/**
+ * @brief i2c_write_reg16 - write 16-bit data value to 16-bit addressed register
+ * @param regaddr - address
+ * @param data - data to write
+ * @return state
+ */
+int i2c_write_reg16(uint16_t regaddr, uint16_t data){
+    if(I2Cfd < 1) return FALSE;
+    union i2c_smbus_data d;
+    d.block[0] = 3;
+    d.block[1] = regaddr & 0xff;
+    d.block[2] = data >> 8;
+    d.block[3] = data & 0xff;
+    struct i2c_smbus_ioctl_data args;
+    args.read_write = I2C_SMBUS_WRITE;
+    args.command    = regaddr >> 8;
+    args.size       = I2C_SMBUS_I2C_BLOCK_DATA;
+    args.data       = &d;
+    if(ioctl(I2Cfd, I2C_SMBUS, &args) < 0){
+        WARN("i2c_write_reg16, ioctl()");
+        return FALSE;
+    }
+    return TRUE;
+}
+
+/**
+ * @brief i2c_set_slave_address - set current slave address
+ * @param addr - address
+ * @return state
+ */
+int i2c_set_slave_address(uint8_t addr){
+    if(I2Cfd < 1) return FALSE;
+    DBG("Try to set slave addr 0x%02X", addr);
+    if(ioctl(I2Cfd, I2C_SLAVE, addr) < 0){
+        WARN("i2c_set_slave_address, ioctl()");
+        return FALSE;
+    }
+    lastaddr = addr;
+    return TRUE;
+}
+
+/**
+ * @brief i2c_open - open I2C device
+ * @param path - full path to device
+ * @return state
+ */
+int i2c_open(const char *path){
+    if(I2Cfd > 0) close(I2Cfd);
+    I2Cfd =  open(path, O_RDWR);
+    if(I2Cfd < 1){
+        WARN("i2c_open, open()");
+        return FALSE;
+    }
+    return TRUE;
+}
+
+void i2c_close(){
+    if(I2Cfd > 0) close(I2Cfd);
+}
+
+/**
+ * @brief read_data16 - read data from 16-bit addressed register
+ * @param regaddr - address
+ * @param N - amount of BYTES!!!
+ * @param array - data read
+ * @return state
+ */
+int i2c_read_data16(uint16_t regaddr, uint16_t N, uint8_t *array){
+    if(I2Cfd < 1 || N == 0 || !array) return FALSE;
+    struct i2c_msg m[2];
+    struct i2c_rdwr_ioctl_data x = {.msgs = m, .nmsgs = 2};
+    m[0].addr = lastaddr; m[1].addr = lastaddr;
+    m[0].flags = 0;
+    m[1].flags = I2C_M_RD;
+    m[0].len = 2; m[1].len = N;
+    uint8_t a[2];
+    a[0] = regaddr >> 8;
+    a[1] = regaddr & 0xff;
+    m[0].buf = a; m[1].buf = array;
+    if(ioctl(I2Cfd, I2C_RDWR, &x) < 0){
+        WARN("i2c_read_data16, ioctl()");
+        return FALSE;
+    }
+    return TRUE;
+}
+
+/**
+ * @brief read_data8 - read data from 8-bit addressed register
+ * @param regaddr - address
+ * @param N - amount of bytes
+ * @param array - data read
+ * @return state
+ */
+int i2c_read_data8(uint8_t regaddr, uint16_t N, uint8_t *array){
+    if(I2Cfd < 1 || N < 1 || N+regaddr > 0xff || !array) return FALSE;
+    struct i2c_msg m[2];
+    struct i2c_rdwr_ioctl_data x = {.msgs = m, .nmsgs = 2};
+    m[0].addr = lastaddr; m[1].addr = lastaddr;
+    m[0].flags = 0; // write register address
+    m[1].flags = I2C_M_RD; // read contents
+    m[0].len = 1; m[1].len = N;
+    m[0].buf = &regaddr; m[1].buf = array;
+    if(ioctl(I2Cfd, I2C_RDWR, &x) < 0){
+        WARN("i2c_read_data8, ioctl()");
+        return FALSE;
+    }
+    return TRUE;
+}

I2Csensors/i2c.h

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdint.h>
+
+#ifndef FALSE
+#define FALSE 0
+#endif
+#ifndef TRUE
+#define TRUE 1
+#endif
+
+int i2c_open(const char *path);
+void i2c_close();
+int i2c_set_slave_address(uint8_t addr);
+int i2c_write_raw(uint8_t *data, int len);
+int i2c_read_raw(uint8_t *data, int len);
+int i2c_read_reg8(uint8_t regaddr, uint8_t *data);
+int i2c_write_reg8(uint8_t regaddr, uint8_t data);
+int i2c_read_data8(uint8_t regaddr, uint16_t N, uint8_t *array);
+int i2c_read_reg16(uint16_t regaddr, uint16_t *data);
+int i2c_write_reg16(uint16_t regaddr, uint16_t data);
+int i2c_read_data16(uint16_t regaddr, uint16_t N, uint8_t *array);
+

I2Csensors/i2csensorsPTH.h

@@ -0,0 +1,68 @@
+/*
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdint.h>
+
+// timeout of i2c waiting
+#define I2C_TIMEOUT     (.5)
+
+typedef enum{
+    SENS_NOTINIT,   // wasn't inited
+    SENS_BUSY,      // measurement in progress
+    SENS_ERR,       // error occured
+    SENS_RELAX,     // do nothing
+    SENS_RDY,       // data ready - can get it
+} sensor_status_t;
+
+typedef union{
+    struct{
+        uint8_t T   : 1; // can temperature (degC)
+        uint8_t H   : 1; // can humidity (percent)
+        uint8_t P   : 1; // can pressure (hPa)
+        uint8_t htr : 1; // have heater
+    };
+    uint32_t flags;
+} sensor_props_t;
+
+typedef struct{
+    double T;
+    double H;
+    double P;
+} sensor_data_t;
+
+//struct sensor_struct;
+typedef struct sensor_struct sensor_t;
+
+int sensors_open(const char *dev);
+void sensors_close();
+char *sensors_list();
+sensor_t* sensor_new(const char *name);
+void sensor_delete(sensor_t **s);
+sensor_props_t sensor_properties(sensor_t *s);
+int sensor_init(sensor_t *s, uint8_t address);
+int sensor_heater(sensor_t *s, int on);
+int sensor_start(sensor_t *s);
+sensor_status_t sensor_process(sensor_t *s);
+int sensor_getdata(sensor_t *s, sensor_data_t *d);
+
+// I2C functions for client usage
+int sensor_writeI2C(uint8_t addr, uint8_t *data, int len);
+int sensor_readI2C(uint8_t addr, uint8_t *data, int len);
+int sensor_readI2Cregs(uint8_t addr, uint8_t regaddr, uint16_t N, uint8_t *data);
+int sensor_writeI2Creg(uint8_t addr, uint8_t regaddr, uint8_t data);

I2Csensors/i2csensorsPTH.pc.in

@@ -0,0 +1,10 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir=${prefix}/include
+
+Name: @PROJ@
+Description: I2C library working with pressure/temperature/humidity sensors
+Version: @VERSION@
+Libs: -L${libdir} -l@PROJ@
+Cflags: -I${includedir}

I2Csensors/sensor.c

@@ -0,0 +1,186 @@
+/*
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <usefull_macros.h>
+
+#include "aht.h"
+#include "BMP180.h"
+#include "BMP280.h"
+#include "BMP580.h"
+#include "i2c.h"
+#include "sensors_private.h"
+#include "SHT3x.h"
+#include "SI7005.h"
+
+// NULL-terminated list of all supported sensors
+static const sensor_t* supported_sensors[] = {&AHT10, &AHT15, &AHT20, &AHT21, &BME280, &BMP180, &BMP280, &BMP580, &SHT3x, &SI7005, NULL};
+
+// just two stupid wrappers
+int sensors_open(const char *dev){
+    return i2c_open(dev);
+}
+void sensors_close(){
+    i2c_close();
+}
+
+// init sensor with optional new address
+int sensor_init(sensor_t *s, uint8_t address){
+    if(!s) return FALSE;
+    if(address) s->address = address;
+    else address = s->address; // default
+    if(!i2c_set_slave_address(address)){
+        DBG("Can't set slave address 0x%02x", address);
+        return FALSE;
+    }
+    if(!i2c_read_reg8(0, NULL)){
+        DBG("Can't connect!");
+        return FALSE;
+    }
+    double t0 = sl_dtime();
+    int result = FALSE;
+    while(sl_dtime() - t0 < I2C_TIMEOUT && !(result = s->init(s))) usleep(10000);
+    DBG("INIT: %d", result);
+    return result;
+}
+
+// find supported sensor by name and return allocated struct
+sensor_t *sensor_new(const char *name){
+    if(!name || !*name) return NULL;
+    const sensor_t **p = supported_sensors;
+    while(*p){
+        if(0 == strcmp((*p)->name, name)){
+            sensor_t *n = MALLOC(sensor_t, 1);
+            memcpy(n, *p, sizeof(sensor_t));
+            return n;
+        }
+        ++p;
+    }
+    return NULL;
+}
+
+void sensor_delete(sensor_t **s){
+    if(!s || !*s) return;
+    if((*s)->privdata) FREE((*s)->privdata);
+    // here could be additional free's
+    FREE((*s));
+}
+
+// list all supported sensors, return allocated string - should be free'd later
+char *sensors_list(){
+    const sensor_t **p = supported_sensors;
+    int L = 0, rest = 0, idx = 0;
+    char *list = NULL;
+#define PORTIONSZ 256
+    while(*p){
+        int l = strlen((*p)->name);
+        if(rest < l+2){
+            int add = PORTIONSZ * ((PORTIONSZ + 2 + l - rest) / PORTIONSZ);
+            rest += add; L += add;
+            list = realloc(list, L);
+        }
+        if(idx == 0) l = sprintf(list, "%s", (*p)->name);
+        else l = sprintf(list+idx, ",%s", (*p)->name);
+        rest -= l; idx += l;
+        //DBG("L=%d, rest=%d, idx=%d, list='%s'", L, rest, idx, list);
+        ++p;
+    }
+#undef PORTIONSZ
+    return list;
+}
+
+// wrapper with timeout
+int sensor_start(sensor_t *s){
+    if(!s) return FALSE;
+    DBG("Start");
+    if(!i2c_set_slave_address(s->address)){
+        DBG("Can't set slave address 0x%02x", s->address);
+        return FALSE;
+    }
+    double t0 = sl_dtime();
+    int result = FALSE;
+    while(sl_dtime() - t0 < I2C_TIMEOUT && !(result = s->start(s))) usleep(10000);
+    DBG("result: %d", result);
+    return result;
+}
+
+int sensor_getdata(sensor_t *s, sensor_data_t *d){
+    if(!s || !d) return FALSE;
+    if(s->status != SENS_RDY) return FALSE;
+    *d = s->data;
+    s->status = SENS_RELAX;
+    return TRUE;
+}
+
+sensor_status_t sensor_process(sensor_t *s){
+    if(!s) return FALSE;
+    DBG("Process");
+    if(!i2c_set_slave_address(s->address)){
+        DBG("Can't set slave address 0x%02x", s->address);
+        return FALSE;
+    }
+    return s->process(s);
+}
+
+sensor_props_t sensor_properties(sensor_t *s){
+    sensor_props_t def = {0};
+    if(!s) return def;
+    return s->properties(s);
+}
+
+int sensor_heater(sensor_t *s, int on){
+    if(!s || !s->properties(s).htr || !s->heater) return FALSE;
+    if(!i2c_set_slave_address(s->address)){
+        DBG("Can't set slave address 0x%02x", s->address);
+        return FALSE;
+    }
+    return s->heater(s, on);
+}
+
+
+int sensor_writeI2C(uint8_t addr, uint8_t *data, int len){
+    if(!data || len < 1) return FALSE;
+    if(!i2c_set_slave_address(addr)){
+        DBG("Can't set slave address 0x%02x", addr);
+        return FALSE;
+    }
+    return i2c_write_raw(data, len);
+}
+int sensor_readI2C(uint8_t addr, uint8_t *data, int len){
+    if(!data || len < 1) return FALSE;
+    if(!i2c_set_slave_address(addr)){
+        DBG("Can't set slave address 0x%02x", addr);
+        return FALSE;
+    }
+    return i2c_read_raw(data, len);
+}
+int sensor_readI2Cregs(uint8_t addr, uint8_t regaddr, uint16_t N, uint8_t *data){
+    if(!data || N < 1) return FALSE;
+    if(!i2c_set_slave_address(addr)){
+        DBG("Can't set slave address 0x%02x", addr);
+        return FALSE;
+    }
+    return i2c_read_data8(regaddr, N, data);
+}
+int sensor_writeI2Creg(uint8_t addr, uint8_t regaddr, uint8_t data){
+    if(!i2c_set_slave_address(addr)){
+        DBG("Can't set slave address 0x%02x", addr);
+        return FALSE;
+    }
+    return i2c_write_reg8(regaddr, data);
+}

I2Csensors/sensor.cflags

@@ -0,0 +1 @@
+-std=c17

I2Csensors/sensor.config

@@ -0,0 +1,2 @@
+#define _XOPEN_SOURCE 9999
+#define _POSIX_C_SOURCE  333333L

I2Csensors/sensor.creator

@@ -0,0 +1 @@
+[General]

I2Csensors/sensor.creator.user

@@ -0,0 +1,217 @@
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I2Csensors/sensor.cxxflags

@@ -0,0 +1 @@
+-std=c++17

I2Csensors/sensor.files

@@ -0,0 +1,22 @@
+BMP180.c
+BMP180.h
+BMP280.c
+BMP280.h
+BMP580.c
+BMP580.h
+SHT3x.c
+SHT3x.h
+SI7005.c
+SI7005.h
+aht.c
+aht.h
+examples/CMakeLists.txt
+examples/logmany.c
+examples/single_sensor.c
+i2c.c
+i2c.h
+i2csensorsPTH.h
+main.c
+sensor.c
+sensor.h
+sensors_private.h

I2Csensors/sensor.includes

@@ -0,0 +1 @@
+.

I2Csensors/sensors_private.h

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdint.h>
+
+#include "i2csensorsPTH.h"
+
+// unfortunately, we have no "self" pointer in C, so we should add this struct calling to each function for further purposes
+struct sensor_struct{
+    const char *name;                                       // name
+    uint8_t address;                                        // sensor's address
+    uint32_t private;                                       // private information (e.g. for almost similar sensors with some slight differences)
+    void *privdata;                                         // some private data for calibration etc
+    sensor_status_t status;                                 // status of sensor
+    sensor_data_t data;                                     // measured data
+    int (*init)(struct sensor_struct*);                     // init device - @ start after POR or in case of errors
+    int (*start)(struct sensor_struct*);                    // start measuring
+    int (*heater)(struct sensor_struct *, int);             // turn heater on/off (1/0)
+    sensor_status_t (*process)(struct sensor_struct*);      // main polling process
+    sensor_props_t (*properties)(struct sensor_struct*);    // get properties
+};
+

deepseek/transformator

@@ -0,0 +1,197 @@
+Да, конечно! Написать программу на C для этой задачи вполне возможно. Это典型的 задача инженерного расчета, которая хорошо ложится на процедурный подход языка C.
+
+Вот пример структуры программы на C:
+
+## Структура программы
+
+```c
+#include <stdio.h>
+#include <math.h>
+#include <float.h>
+
+// Константы
+#define PI 3.141592653589793
+#define MU_0 (4.0 * PI * 1e-7)
+#define DENSITY_CU 8900.0    // плотность меди, кг/м³
+#define PRICE_CU 8.5         // цена меди, у.е./кг
+#define K_FILL 0.3           // коэффициент заполнения окна
+#define EFFICIENCY 0.95      // КПД трансформатора
+
+// Структура для описания сердечника
+typedef struct {
+    char name[20];           // название сердечника
+    double S_fe;             // сечение магнитопровода, м²
+    double S_window;         // площадь окна, м²
+    double price_fe;         // стоимость сердечника, у.е.
+    double B_max;            // максимальная индукция, Тл
+    double k_fe;             // коэффициент формы
+} Core;
+
+// Структура для параметров трансформатора
+typedef struct {
+    double P_out;            // выходная мощность, Вт
+    double U_in;             // входное напряжение, В
+    double U_out;            // выходное напряжение, В
+    double f;                // частота, Гц
+    double J;                // плотность тока, А/мм²
+} TransformerParams;
+
+// Структура для результатов расчета
+typedef struct {
+    Core core;
+    double N1, N2;           // число витков
+    double d_wire1, d_wire2; // диаметры проводов, мм
+    double cost_total;       // общая стоимость
+    double cost_cu;          // стоимость меди
+    int is_valid;           // флаг валидности расчета
+} CalculationResult;
+
+// Функция расчета одного варианта
+CalculationResult calculate_transformer(const TransformerParams* params, const Core* core) {
+    CalculationResult result = {0};
+    result.core = *core;
+    
+    // Расчет числа витков
+    result.N1 = (params->U_in * 1.05) / (4.44 * params->f * core->B_max * core->S_fe);
+    result.N2 = (params->U_out * 1.05) / (4.44 * params->f * core->B_max * core->S_fe);
+    
+    // Расчет токов
+    double I1 = params->P_out / (params->U_in * EFFICIENCY);
+    double I2 = params->P_out / params->U_out;
+    
+    // Расчет сечений проводов
+    double s_wire1 = I1 / (params->J * 1e6); // м²
+    double s_wire2 = I2 / (params->J * 1e6); // м²
+    
+    result.d_wire1 = sqrt(s_wire1 * 4 / PI) * 1000; // мм
+    result.d_wire2 = sqrt(s_wire2 * 4 / PI) * 1000; // мм
+    
+    // Проверка заполнения окна
+    double occupied_area = (result.N1 * s_wire1 + result.N2 * s_wire2) / K_FILL;
+    result.is_valid = (occupied_area <= core->S_window);
+    
+    if (result.is_valid) {
+        // Оценка стоимости меди (упрощенно)
+        // Предполагаем среднюю длину витка пропорциональной корню из площади окна
+        double mean_length_turn = 4 * sqrt(core->S_window); // м
+        double length_wire1 = result.N1 * mean_length_turn;
+        double length_wire2 = result.N2 * mean_length_turn;
+        
+        double volume_cu = length_wire1 * s_wire1 + length_wire2 * s_wire2;
+        double mass_cu = volume_cu * DENSITY_CU;
+        
+        result.cost_cu = mass_cu * PRICE_CU;
+        result.cost_total = core->price_fe + result.cost_cu;
+    }
+    
+    return result;
+}
+
+// Основная функция оптимизации
+Core find_optimal_core(const TransformerParams* params, Core* cores, int num_cores) {
+    CalculationResult best_result = {0};
+    best_result.cost_total = DBL_MAX;
+    int best_index = -1;
+    
+    printf("Расчет трансформатора:\n");
+    printf("P = %.1f Вт, Uin = %.1f В, Uout = %.1f В, f = %.1f Гц\n\n",
+           params->P_out, params->U_in, params->U_out, params->f);
+    
+    for (int i = 0; i < num_cores; i++) {
+        CalculationResult result = calculate_transformer(params, &cores[i]);
+        
+        printf("Сердечник: %s\n", cores[i].name);
+        printf("  N1 = %.0f, N2 = %.0f, d1 = %.2f мм, d2 = %.2f мм\n",
+               result.N1, result.N2, result.d_wire1, result.d_wire2);
+        printf("  Стоимость: сердечник = %.2f, медь = %.2f, общая = %.2f\n",
+               cores[i].price_fe, result.cost_cu, result.cost_total);
+        printf("  Статус: %s\n\n", result.is_valid ? "ПОДХОДИТ" : "НЕ ПОДХОДИТ");
+        
+        if (result.is_valid && result.cost_total < best_result.cost_total) {
+            best_result = result;
+            best_index = i;
+        }
+    }
+    
+    if (best_index >= 0) {
+        printf("ОПТИМАЛЬНЫЙ ВАРИАНТ:\n");
+        printf("Сердечник: %s\n", cores[best_index].name);
+        printf("Общая стоимость: %.2f у.е.\n", best_result.cost_total);
+        return cores[best_index];
+    } else {
+        printf("НЕ УДАЛОСЬ НАЙТИ ПОДХОДЯЩИЙ СЕРДЕЧНИК!\n");
+        Core empty = {0};
+        return empty;
+    }
+}
+
+// Пример использования
+int main() {
+    // Параметры трансформатора
+    TransformerParams params = {
+        .P_out = 100.0,      // 100 Вт
+        .U_in = 220.0,       // 220 В
+        .U_out = 12.0,       // 12 В  
+        .f = 50.0,           // 50 Гц
+        .J = 3.0             // 3 А/мм²
+    };
+    
+    // База данных стандартных сердечников
+    Core cores[] = {
+        {"ШЛ20х25", 5.0e-4, 4.0e-4, 15.0, 1.2, 1.2},
+        {"ШЛ25х32", 8.0e-4, 6.4e-4, 22.0, 1.2, 1.2},
+        {"ШЛ32х40", 12.8e-4, 10.0e-4, 35.0, 1.2, 1.2},
+        {"Тороид_40", 12.0e-4, 8.0e-4, 28.0, 1.3, 1.6},
+        {"Тороид_50", 15.0e-4, 12.0e-4, 42.0, 1.3, 1.6}
+    };
+    
+    int num_cores = sizeof(cores) / sizeof(cores[0]);
+    
+    // Поиск оптимального сердечника
+    Core optimal = find_optimal_core(&params, cores, num_cores);
+    
+    return 0;
+}
+```
+
+## Ключевые особенности реализации:
+
+1. **Модульная структура** - разделение на логические блоки
+2. **Структуры данных** для параметров, сердечников и результатов
+3. **Итерационный поиск** по базе сердечников
+4. **Проверка ограничений** (заполнение окна)
+5. **Критерий оптимизации** - минимальная стоимость
+
+## Дополнительные улучшения, которые можно добавить:
+
+```c
+// Функция для итерационного подбора плотности тока
+void optimize_current_density(TransformerParams* params, Core* cores, int num_cores) {
+    double best_J = 2.0;
+    double best_cost = DBL_MAX;
+    
+    for (double J = 2.0; J <= 4.0; J += 0.5) {
+        params->J = J;
+        // ... расчет для каждой плотности тока
+    }
+}
+
+// Чтение базы сердечников из файла
+int read_cores_from_file(const char* filename, Core** cores) {
+    // ... реализация чтения из CSV или текстового файла
+}
+
+// Расчет габаритной мощности
+double calculate_gabarit_power(const Core* core, const TransformerParams* params) {
+    return core->S_fe * core->S_window * core->k_fe * 
+           params->J * 1e6 * core->B_max * params->f;
+}
+```
+
+Такой подход позволяет:
+- Легко добавлять новые типы сердечников
+- Менять критерии оптимизации
+- Интегрироваться с другими системами
+- Проводить параметрические исследования
+
+Программа будет эффективно работать даже с большими базами сердечников и может быть легко расширена для дополнительных расчетов.

stringHash4MCU_/Readme

@@ -5,3 +5,16 @@ another files used for test: use script ./run for it
 
 Compile: gcc -lusefull_macro file.c -o file
 gcc -lusefull_macro test.c hash.c -o test
+
+
+file helpcmds.in should be included into proto.c as help list:
+
+const char *helpstring =
+    "https://github.com/eddyem/stm32samples/tree/master/F3:F303/Multistepper build#" BUILD_NUMBER " @ " BUILD_DATE "\n"
+    "Format: cmd [N] - getter, cmd [N] = val - setter; N - optional index\n"
+    "* - command not supported yet, G - getter, S - setter\n\n"
+#include "hashgen/helpcmds.in"
+;
+
+
+helpcmds.in format: each string should be in quotes with '\n' @ its end. First word - command, next text - help.

stringHash4MCU_/hashgen.c

@@ -20,6 +20,8 @@
 #include <usefull_macros.h>
 #include <ctype.h>
 
+// maximal string length (n*4) without terminating '\0' - for buffers
+#define MAXCMDLEN   (128)
 #define ALLOCSZ     (5000)
 
 typedef struct{
@@ -31,35 +33,44 @@ typedef struct{
 
 static glob_pars G = {.headerfile = "hash.h", .sourcefile = "hash.c"};
 static int help = 0;
-static myoption cmdlnopts[] = {
+static sl_option_t cmdlnopts[] = {
     {"help",    NO_ARGS,    NULL,   'h',    arg_int,    APTR(&help),        "show this help"},
     {"dict",    NEED_ARG,   NULL,   'd',    arg_string, APTR(&G.dict),      "dictionary file"},
     {"header",  NEED_ARG,   NULL,   'H',    arg_string, APTR(&G.headerfile),"output header filename"},
     {"source",  NEED_ARG,   NULL,   'S',    arg_string, APTR(&G.sourcefile),"output source filename"},
-    {"genfunc", NO_ARGS,    NULL,   'F',    arg_int,    APTR(&G.genfunc),   "generate function bodys"},
+    {"genfunc", NO_ARGS,    NULL,   'F',    arg_int,    APTR(&G.genfunc),   "generate function bodies"},
     end_option
 };
 static void parse_args(int argc, char **argv){
-    parseargs(&argc, &argv, cmdlnopts);
-    if(help) showhelp(-1, cmdlnopts);
+    sl_parseargs(&argc, &argv, cmdlnopts);
+    if(help) sl_showhelp(-1, cmdlnopts);
     if(argc > 0){
         red("Unused arguments:\n");
         for(int i = 0; i < argc; ++i)
             printf("%s ", argv[i]);
         printf("\n");
-        showhelp(-1, cmdlnopts);
+        sl_showhelp(-1, cmdlnopts);
     }
 }
 
-#define HASHFNO (3)
+#define HASHFNO (4)
+static uint32_t my(const char *str){
+    char buf[MAXCMDLEN+1];
+    uint32_t hash = 0, *c = (uint32_t*)buf;
+    bzero(buf, sizeof(buf));
+    int len = strlen(str);
+    memcpy(buf, str, len);
+    len = (len + 3) / 4;
+    for(int i = 0; i < len; ++i)
+        hash = (hash << 2) + c[i];
+    return hash;
+}
 // djb2 & sdbm: http://www.cse.yorku.ca/~oz/hash.html
 static uint32_t djb2(const char *str){
     uint32_t hash = 5381;
     uint32_t c;
     while((c = (uint32_t)*str++))
         hash = ((hash << 7) + hash) + c;
-        //hash = hash * 31 + c;
-        //hash = hash * 33 + c;
     return hash;
 }
 static uint32_t sdbm(const char *str){
@@ -84,6 +95,17 @@ static uint32_t jenkins(const char *str){
 }
 
 static const char *hashsources[HASHFNO] = {
+"static uint32_t hashf(const char *str){\n\
+    char buf[CMD_MAXLEN+1];\n\
+    uint32_t hash = 0, *c = (uint32_t*)buf;\n\
+    bzero(buf, sizeof(buf));\n\
+    int len = strlen(str);\n\
+    memcpy(buf, str, len);\n\
+    len = (len + 3) / 4;\n\
+    for(int i = 0; i < len; ++i)\n\
+        hash = (hash << 2) + c[i];\n\
+    return hash;\n\
+}\n",
 "static uint32_t hashf(const char *str){\n\
     uint32_t hash = 5381;\n\
     uint32_t c;\n\
@@ -112,13 +134,14 @@ static const char *hashsources[HASHFNO] = {
 }\n"
 };
 
-static uint32_t (*hash[HASHFNO])(const char *str) = {djb2, sdbm, jenkins};
-static const char *hashnames[HASHFNO] = {"DJB2", "SDBM", "Jenkins"};
+static uint32_t (*hash[HASHFNO])(const char *str) = {my, djb2, sdbm, jenkins};
+static const char *hashnames[HASHFNO] = {"My", "DJB2", "SDBM", "Jenkins"};
 
 typedef struct{
-    char str[32];       // string command
-    char fname[32];     // function namee
-    uint32_t hash;      // command hash
+    char str[MAXCMDLEN+1];      // string command define (capital letters)
+    char fname[MAXCMDLEN+1];    // function name
+    char macroname[MAXCMDLEN+1];// macro name
+    uint32_t hash;              // command hash
 } strhash;
 
 static int sorthashesH(const void *a, const void *b){ // sort by hash
@@ -143,11 +166,11 @@ static FILE *openoutp(const char *name){
 }
 
 static char *macroname(const char *cmd){
-    static char macro[32];
+    static char macro[MAXCMDLEN+1];
     int i = 0;
-    while(i < 31 && *cmd){
+    while(i < MAXCMDLEN && *cmd){
         char c = *cmd++;
-        if(!isalnum(c)) c = '_';
+        if(!isalpha(c)) c = '_';
         if(islower(c)) c = toupper(c);
         macro[i++] = c;
     }
@@ -156,9 +179,9 @@ static char *macroname(const char *cmd){
 }
 
 static char *fnname(const char *cmd){
-    static char fn[32];
+    static char fn[MAXCMDLEN+1];
     int i = 0;
-    while(i < 31 && *cmd){
+    while(i < MAXCMDLEN && *cmd){
         char c = *cmd++;
         if(!isalpha(c)) c = '_';
         if(isupper(c)) c = tolower(c);
@@ -170,17 +193,14 @@ static char *fnname(const char *cmd){
 
 static const char *fhdr =
 "int parsecmd(const char *str){\n\
-        char cmd[CMD_MAXLEN + 1];\n\
-        if(!str || !*str) return RET_CMDNOTFOUND;\n\
-        int i = 0;\n\
-        while(*str > '@' && i < CMD_MAXLEN){ cmd[i++] = *str++; }\n\
-        cmd[i] = 0;\n\
-        if(*str){\n\
-            while(*str <= ' ') ++str;\n\
-        }\n\
-        char *args = (char*) str;\n\
-        uint32_t h = hashf(cmd);\n\
-        switch(h){\n\n"
+    if(!str || !*str) return RET_CMDNOTFOUND;\n\
+    bzero(lastcmd, sizeof(lastcmd));\n\
+    int i = 0;\n\
+    while(*str > '@' && i < CMD_MAXLEN){ lastcmd[i++] = *str++; }\n\
+    while(*str && *str <= ' ') ++str;\n\
+    char *args = (char*) str;\n\
+    uint32_t h = hashf(lastcmd);\n\
+    switch(h){\n"
 ;
 static const char *ffooter =
 "        default: break;\n\
@@ -189,43 +209,58 @@ static const char *ffooter =
 }\n\n"
 ;
 static const char *fns =
-"int fn_%s(_U_ uint32_t hash,  _U_ char *args) WAL; // \"%s\" (%u)\n\n"
+    "int fn_%s(uint32_t _U_ hash, char _U_ *args) WAL; // \"%s\" (%u)\n"
 ;
-static const char *headercontent = "#ifndef _U_\n\
+static const char *fnsh =
+    "int fn_%s(uint32_t, char*); // \"%s\" (%u)\n"
+;
+static const char *headercontent =
+"// Generated by HASHGEN (https://github.com/eddyem/eddys_snippets/tree/master/stringHash4MCU_)\n\
+// Licensed by GPLv3\n\
+#pragma once\n\
+#ifndef _U_\n\
 #define _U_ __attribute__((__unused__))\n\
 #endif\n\n\
-#define CMD_MAXLEN  (32)\n\n\
+#define CMD_MAXLEN  (%d)\n\n\
 enum{\n\
+   RET_HELP = -3,\n\
    RET_CMDNOTFOUND = -2,\n\
    RET_WRONGCMD = -1,\n\
-   RET_BAD = 0,\n\
-   RET_GOOD = 1\n\
+   RET_GOOD = 0,\n\
+   RET_BAD = 1\n\
 };\n\n\
-int parsecmd(const char *cmdwargs);\n\n";
+int parsecmd(const char *cmdwargs);\n\n\
+extern char lastcmd[];\n\n";
+
 static const char *sw =
 "        case CMD_%s:\n\
             return fn_%s(h, args);\n\
         break;\n";
 static const char *srchdr =
-"#include <stdint.h>\n\
+"// Generated by HASHGEN (https://github.com/eddyem/eddys_snippets/tree/master/stringHash4MCU_)\n\
+// Licensed by GPLv3\n\
+#include <stdint.h>\n\
 #include <stddef.h>\n\
+#include <string.h>\n\
 #include \"%s\"\n\n\
 #ifndef WAL\n\
 #define WAL __attribute__ ((weak, alias (\"__f1\")))\n\
-#endif\n\nstatic int __f1(_U_ uint32_t h, _U_ char *a){return 1;}\n\n"
+#endif\n\nstatic int __f1(uint32_t _U_ h, char _U_ *a){return RET_BAD;}\n\n\
+char lastcmd[CMD_MAXLEN + 1];\n\n"
 ;
 
 static void build(strhash *H, int hno, int hlen){
     green("Generate files for hash function '%s'\n", hashnames[hno]);
     int lmax = 1;
     for(int i = 0; i < hlen; ++i){
+        strcpy(H[i].macroname, macroname(H[i].str));
         int l = strlen(H[i].str);
         if(l > lmax){
             lmax = l;
         }
     }
     lmax = (lmax + 3)/4;
-    lmax *= 4;
+    lmax *= 4; // round by 4 bytes
     // resort H by strings
     qsort(H, hlen, sizeof(strhash), sorthashesS);
     FILE *source = openoutp(G.sourcefile), *header = openoutp(G.headerfile);
@@ -235,26 +270,36 @@ static void build(strhash *H, int hno, int hlen){
             fprintf(source, fns, H[i].fname, H[i].str, H[i].hash);
         }
     }
-    fprintf(header, "%s", headercontent);
-    fprintf(source, "%s\n", hashsources[hno]);
+    fprintf(header, headercontent, lmax);
+    fprintf(source, "\n%s\n", hashsources[hno]);
     fprintf(source, "%s", fhdr);
     for(int i = 0; i < hlen; ++i){
-        char *m = macroname(H[i].str);
-        fprintf(source, sw, m, H[i].fname);
-        fprintf(header, "#define CMD_%-*s    (%u)\n", lmax, m, H[i].hash);
+        fprintf(source, sw, H[i].macroname, H[i].fname);
+        fprintf(header, "#define CMD_%-*s    (%u)\n", lmax, H[i].macroname, H[i].hash);
     }
     fprintf(source, "%s", ffooter);
     fclose(source);
+    fprintf(header, "\n");
+    for(int i = 0; i < hlen; ++i){
+        fprintf(header, "#define STR_%-*s    \"%s\"\n", lmax, H[i].macroname, H[i].str);
+    }
+    if(G.genfunc){
+        fprintf(header, "\n");
+        for(int i = 0; i < hlen; ++i){
+            fprintf(header, fnsh, H[i].fname, H[i].str, H[i].hash);
+        }
+    }
+
     fclose(header);
 }
 
 int main(int argc, char **argv){
-    initial_setup();
+    sl_init();
     parse_args(argc, argv);
     if(!G.dict) ERRX("point dictionary file");
     if(!G.headerfile) ERRX("point header source file");
     if(!G.sourcefile) ERRX("point c source file");
-    mmapbuf *b = My_mmap(G.dict);
+    sl_mmapbuf_t *b = sl_mmap(G.dict);
     if(!b) ERRX("Can't open %s", G.dict);
     char *word = b->data;
     strhash *H = MALLOC(strhash, ALLOCSZ);
@@ -267,19 +312,26 @@ int main(int argc, char **argv){
         }
         while(*word && *word < 33) ++word;
         if(!*word) break;
-        char *nxt = strchr(word, '\n');
+        char *eol = strchr(word, '\n');
+        char *sp = strchr(word, ' ');
+        char *nxt = eol;
+        if(sp){ // got space after command - truncate
+            if(eol){
+                if(eol > sp) nxt = sp; // space before strend
+            }else nxt = sp; // no strend, but have space
+        };
         if(nxt){
             int len = nxt - word;
-            if(len > 31) len = 31;
+            if(len > MAXCMDLEN) len = MAXCMDLEN;
             strncpy(H[idx].str, word, len);
             H[idx].str[len] = 0;
         }else{
-            snprintf(H[idx].str, 31, "%s", word);
+            snprintf(H[idx].str, MAXCMDLEN, "%s", word);
         }
-        snprintf(H[idx].fname, 31, "%s", fnname(H[idx].str));
+        snprintf(H[idx].fname, MAXCMDLEN, "%s", fnname(H[idx].str));
         ++idx;
-        if(!nxt) break;
-        word = nxt + 1;
+        if(!eol) break;
+        word = eol + 1;
     }
     // test fname matches
     qsort(H, idx, sizeof(strhash), sorthashesF);
@@ -300,7 +352,11 @@ int main(int argc, char **argv){
         strhash *p = H;
         int nmatches = 0;
         for(int i = 0; i < imax1; ++i, ++p){ // test hash matches
-            if(p->hash == p[1].hash) ++nmatches;
+            if(p->hash == p[1].hash){
+                red("Found matched pair:");
+                printf(" '%s' and '%s'\n", p->str, p[1].str);
+                ++nmatches;
+            }
         }
         if(nmatches == 0){
             build(H, hno, idx);
@@ -310,6 +366,6 @@ int main(int argc, char **argv){
     }
     if(hno == HASHFNO) WARNX("Can't find proper hash function");
     FREE(H);
-    My_munmap(b);
+    sl_munmap(b);
     return 0;
 }

stringHash4MCU_/hashtest.c

@@ -1,117 +0,0 @@
-/*
- * Copyright 2022 Edward V. Emelianov <edward.emelianoff@gmail.com>.
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <stdio.h>
-#include <string.h>
-#include <usefull_macros.h>
-
-#define ALLOCSZ     (5000)
-#define DJB2
-
-#if defined DJB2
-// djb2 http://www.cse.yorku.ca/~oz/hash.html
-static uint32_t hash(const char *str){
-    uint32_t hash = 5381;
-    uint32_t c;
-    while((c = (uint32_t)*str++))
-        hash = ((hash << 5) + hash) + c;
-        //hash = hash * 31 + c;
-        //hash = hash * 33 + c;
-    return hash;
-}
-#elif defined SDBM
-static uint32_t hash(const char *str){ // sdbm
-    uint32_t hash = 5381;
-    uint32_t c;
-    while((c = (uint32_t)*str++))
-        hash = c + (hash << 6) + (hash << 16) - hash;
-    return hash;
-}
-#elif defined JENKINS
-uint32_t hash(const char *str){
-    uint32_t hash = 0, c;
-    while((c = (uint32_t)*str++)){
-        hash += c;
-        hash += (hash << 10);
-        hash ^= (hash >> 6);
-    }
-    hash += (hash << 3);
-    hash ^= (hash >> 11);
-    hash += (hash << 15);
-    return hash;
-}
-#endif
-
-
-typedef struct{
-    char str[32];
-    uint32_t hash;
-} strhash;
-
-static int sorthashes(const void *a, const void *b){
-    register uint32_t h1 = ((strhash*)a)->hash, h2 = ((strhash*)b)->hash;
-    if(h2 > h1) return h2 - h1;
-    else return -((h1 - h2));
-}
-
-int main(int argc, char **argv){
-    //char buf[32];
-    initial_setup();
-    if(argc != 2) ERRX("Usage: %s dictionary_file", argv[0]);
-    mmapbuf *b = My_mmap(argv[1]);
-    if(!b) ERRX("Can't open %s", argv[1]);
-    char *word = b->data;
-    strhash *H = MALLOC(strhash, ALLOCSZ);
-    int l = ALLOCSZ, idx = 0;
-    while(*word){
-        if(idx >= l){
-            l += ALLOCSZ;
-            H = realloc(H, sizeof(strhash) * l);
-            if(!H) ERR("realloc()");
-        }
-        char *nxt = strchr(word, '\n');
-        if(nxt){
-            int len = nxt - word;
-            if(len > 31) len = 31;
-            strncpy(H[idx].str, word, len);
-            H[idx].str[len] = 0;
-            //strncpy(buf, word, len);
-            //buf[len] = 0;
-        }else{
-            //snprintf(buf, 31, "%s", word);
-            snprintf(H[idx].str, 31, "%s", word);
-        }
-        H[idx].hash = hash(H[idx].str);
-        //printf("word: %s\n", buf);
-        //printf("%u\t%s\n", hash(buf), buf);
-        //printf("%u\t%s\n", H[idx].hash, H[idx].str);
-        ++idx;
-        if(!nxt) break;
-        word = nxt + 1;
-    }
-    qsort(H, idx, sizeof(strhash), sorthashes);
-    --idx;
-    strhash *p = H;
-    for(int i = 0; i < idx; ++i, ++p){
-        if(p->hash == p[1].hash){
-            printf("Words '%s' and '%s' have same hashes: %u\n", p->str, p[1].str, p->hash);
-        }
-    }
-    FREE(H);
-    My_munmap(b);
-    return 0;
-}

stringHash4MCU_/helpcmds.in

@@ -0,0 +1,61 @@
+    "absposN - GS absolute position (in steps, setter just changes current value)\n"
+    "accelN - GS accel/decel (steps/s^2)\n"
+    "adcN - G ADC value (N=0..3)\n"
+    "button[N] - G all or given (N=0..6) buttons' state\n"
+    "canerrcodes - G print last CAN errcodes\n"
+    "canfilter - GS can filters, format: bank# FIFO# mode(M/I) num0 [num1 [num2 [num3]]]\n"
+    "canflood - send/clear flood message: ID byte0 ... byteN\n"
+    "canfloodT - GS flood period (>=0ms)\n"
+    "canid - GS CAN ID of device\n"
+    "canignore - GS ignore list (max 10 IDs), negative to delete\n"
+    "canincrflood - send incremental flood message (ID is last for 'flood', stop by 'flood')\n"
+    "canpause - pause IN packets displaying\n"
+    "canreinit - reinit CAN\n"
+    "canresume - resume IN packets displaying\n"
+    "cansend - send data over CAN: send ID byte0 .. byteN (N<8)\n"
+    "canspeed - GS CAN speed (reinit if setter)\n"
+    "canstat - G CAN status\n"
+    "diagn[N] - G DIAG state of motor N (or all)\n"
+    "drvtypeN - GS driver type (0 - only step/dir, 1 - UART, 2 - SPI, 3 - reserved)\n"
+    "dumperr - dump error codes\n"
+    "dumpcmd - dump command codes\n"
+    "dumpconf - dump current configuration\n"
+    "dumpmotN - dump Nth motor configuration\n"
+    "dumpmotflags - dump motor flags' bits\n"
+    "dumpstates - dump motors' state codes\n"
+    "emstop[N] - emergency stop motor N or all\n"
+    "eraseflash [=N] - erase flash data storage (full or only N'th page of it)\n"
+    "esw[N] - G end-switches state\n"
+    "eswreactN - GS end-switches reaction (0 - ignore, 1 - ignore ESW1 and stop@0 only when moving negative, 2 - stop@any, 3 - stop@dir)\n"
+    "gotoN - GS move motor to given absolute position\n"
+    "gotozN - find zero position & refresh counters\n"
+    "gpioconfN* - GS GPIO configuration (0 - PUin, 1 - PPout, 2 - ODout), N=0..2\n"
+    "gpioN - GS GPIO values, N=0..2\n"
+    "help - print this help\n"
+    "maxspeedN - GS max speed (steps per sec)\n"
+    "maxstepsN - GS max steps (from zero ESW)\n"
+    "mcut - G MCU T\n"
+    "mcuvdd - G MCU Vdd\n"
+    "microstepsN - GS microsteps settings (2^0..2^9)\n"
+    "minspeedN -  min speed (steps per sec)\n"
+    "motcurrentN - GS motor current (1..32 for 1/32..32/32 of max current)\n"
+    "motflagsN - motorN flags\n"
+    "motmul* - GS external multiplexer status (<0 - disable, 0..7 - enable and set address)\n"
+    "motno - GS motor number for next `pdn` commands\n"
+    "motreinit - re-init motors after configuration changed\n"
+    "pdnN - GS read/write TMC2209 registers over uart @ motor0\n"
+    "ping - echo given command back\n"
+    "relposN - GS relative move (get remaining)\n"
+    "relslowN - GS like 'relpos' but with slowest speed\n"
+    "reset - software reset\n"
+    "saveconf - save current configuration\n"
+    "screen* - GS screen enable (1) or disable (0)\n"
+    "speedlimit - G limiting speed for current microsteps setting\n"
+    "stateN - G motor state (0-relax, 1-accel, 2-move, 3-mvslow, 4-decel, 5-stall, 6-err)\n"
+    "stopN - stop motor with deceleration\n"
+    "time - G time from start (ms)\n"
+    "tmcbus* - GS TMC control bus (0 - USART, 1 - SPI)\n"
+    "udata* - GS data by usart in slave mode (text strings, '\\n'-terminated)\n"
+    "usartstatus* - GS status of USART1 (0 - off, 1 - master, 2 - slave)\n"
+    "vdrive - G approx voltage on Vdrive\n"
+    "vfive - G approx voltage on 5V bus\n"

stringHash4MCU_/mktestdic

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+awk '{print $1}' helpcmds.in |sed -e 's/"//' -e 's/\*//' -e 's/\[.*//' -e 's/N//' > testdic
+./hashgen -d testdic -H hdr.h -S hdr.c -F

stringHash4MCU_/runtest

@@ -3,8 +3,12 @@
 gcc hashgen.c -o hashgen -lusefull_macros
 ./hashgen -d testdic -H hdr.h -S hdr.c -F
 gcc hdr.c test.c strfunc.c  -o test
+./test "wrongarg"
+./test "Wrong Arg"
 ./test "time 54 =    some"
 ./test "voltage12 more"
 ./test "esw45 =   some text"
 ./test "goto 55 = "
 ./test "stop 3256"
+./test "mcut"
+

stringHash4MCU_/test.c

@@ -7,12 +7,12 @@
 
 static int noargs(uint32_t hash){
     switch(hash){
-        case CMD_REBOOT: printf("REBOOT\n"); break;
+        case CMD_RESET: printf("REBOOT\n"); break;
         case CMD_TIME: printf("TIME!\n"); break;
-        case CMD_TEMP: printf("Temp\n"); break;
-        default: printf("Unknown hash 0x%x\n", hash); return 0;
+        case CMD_MCUT: printf("Temp\n"); break;
+        default: printf("Unknown hash 0x%x\n", hash); return RET_BAD;
     }
-    return 1;
+    return RET_GOOD;
 }
 static int withparno(uint32_t hash, char *args){
     uint32_t N;
@@ -30,7 +30,7 @@ static int withparno(uint32_t hash, char *args){
     switch(hash){
         case CMD_ESW: fname = "ESW"; break;
         case CMD_GOTO: fname = "GOTO"; break;
-        case CMD_POS: fname = "POS"; break;
+        case CMD_ABSPOS: fname = "ABSPOS"; break;
         case CMD_STOP: fname = "STOP"; break;
         default: fname = "unknown";
     }
@@ -42,12 +42,12 @@ static int withparno(uint32_t hash, char *args){
 // these functions should be global to substitute weak aliases
 int fn_esw(uint32_t hash,  char *args){return withparno(hash, args);}
 int fn_goto(uint32_t hash,  char *args){return withparno(hash, args);}
-int fn_pos(uint32_t hash,  char *args){return withparno(hash, args);}
+int fn_abspos(uint32_t hash,  char *args){return withparno(hash, args);}
 int fn_stop(uint32_t hash,  char *args){return withparno(hash, args);}
 int fn_voltage(uint32_t hash,  char *args){return withparno(hash, args);}
-int fn_reboot(uint32_t hash,  _U_ char *args){return noargs(hash);}
+int fn_reset(uint32_t hash,  _U_ char *args){return noargs(hash);}
 int fn_time(uint32_t hash,  _U_ char *args){return noargs(hash);}
-int fn_temp(uint32_t hash,  _U_ char *args){return noargs(hash);}
+int fn_mcut(uint32_t hash,  _U_ char *args){return noargs(hash);}
 
 int main(int argc, char **argv){
     if(argc != 2) return 1;

stringHash4MCU_/testdic

@@ -1,8 +1,8 @@
-pos
-temp
-voltage
-time
-reboot
-stop
-goto
+abspos
 esw
+goto
+stop
+voltage 
+reset
+time
+mcut