eddy/eddys_snippets
1
0
Fork 0
mirror of https://github.com/eddyem/eddys_snippets.git synced 2026-03-21 17:20:57 +03:00
Code Issues Packages Projects Releases Wiki Activity

ESP simplest server

Browse Source
This commit is contained in:
Edward Emelianov
2025-10-17 00:32:56 +03:00
parent 19fbf250a9
commit ca7a53ee1c
7 changed files with 659 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

182
ESP8266/main.c Normal file
View File

@@ -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;
}