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124 lines
3.8 KiB
C
124 lines
3.8 KiB
C
/*
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* This file is part of the weatherchk project.
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* Copyright 2020 Edward V. Emelianov <edward.emelianoff@gmail.com>.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <ctype.h>
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#include <signal.h>
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#include <stdio.h>
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#include <string.h> // strcmp
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#include <usefull_macros.h>
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#include "cmdlnopts.h"
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#define ERRCTR_MAX 7
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#define BUFLEN 2048
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/**
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* @brief getpar - get parameter value
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* @param string (i) - string where to search
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* @param Val (o) - value found
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* @param Name - parameter name
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* @return 0 if found
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*/
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static int getpar(char *string, double *Val, char *Name){
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char *p = strstr(string, Name);
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if(!p) return 1;
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p += strlen(Name);
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DBG("search %s: %s", Name, p);
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if(!Val) return 0;
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char *endptr;
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*Val = strtod(p, &endptr);
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DBG("eptr=%s, val=%g", endptr, *Val);
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if(endptr == string){
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WARNX("Double value not found");
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return 2;
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}
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return 0;
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}
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int main(int argc, char **argv){
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glob_pars *G = NULL; // default parameters see in cmdlnopts.c
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initial_setup();
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G = parse_args(argc, argv);
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TTY_descr *dev = new_tty(G->ttyname, G->speed, 64);
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if(!dev) return 1;
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size_t got, L = 0;
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char buff[BUFLEN], *ptr = buff;
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int errctr = 0;
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for(; errctr < ERRCTR_MAX; ++errctr){
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if(!tty_open(dev, 1)){
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sleep(1);
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continue;
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}
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while(read_tty(dev)); // clear buffer
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if(write_tty(dev->comfd, "?U\r\n", 3)){
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WARNX("write_tty()");
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continue;
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}
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double t0 = dtime();
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while(dtime() - t0 < 10.){ // timeout - 10s
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got = read_tty(dev);
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if(got == 0) continue;
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t0 = dtime();
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if(L + got > BUFLEN - 1) break;
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L += got;
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buff[L] = 0;
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if(BUFLEN > L){
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strncpy(ptr, dev->buf, dev->buflen);
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ptr += got;
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}else break;
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if(buff[L-1] == '\n' && L > 8) break; // full line received
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}
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if(L == 0){
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WARNX("Got nothing from TTY");
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continue;
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}else if(strncmp(buff, "<?U>", 4)){
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WARNX("Wrong answer: %s", buff);
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L = 0;
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ptr = buff;
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continue;
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}else break;
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}
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while(read_tty(dev));
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close_tty(&dev);
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if(errctr == ERRCTR_MAX){
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ERRX("No connection to meteostation");
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}
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ptr = &buff[4];
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for(size_t i = 4; i < L; ++i){
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char c = *ptr;
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if(isspace(c)) ++ptr;
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}
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char *eol = strchr(ptr, '\n');
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if(eol) *eol = 0;
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DBG("Now: %s\n", ptr);
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if(G->showraw) green("%s\n", ptr);
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double rain = 1., clouds = 1., temperature = -300., wind = 100.;//, windpeak = 100.;
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if(!getpar(ptr, &rain, "RT")) printf("Rain=%g\n", rain);
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if(!getpar(ptr, &clouds, "WU")) printf("Clouds=%g\n", clouds);
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if(!getpar(ptr, &temperature, "TE")) printf("Exttemp=%g\n", temperature);
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if(!getpar(ptr, &wind, "WG")){
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wind /= 3.6;
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printf("Wind=%.1f\n", wind);
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}
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/* if(!getpar(ptr, &windpeak, "WS")){
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windpeak /= 3.6;
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printf("Windpeak=%.1f\n", windpeak);
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}*/
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if(rain > 0.1 || clouds < 1900. || wind > 20.) return 1;
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return 0;
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}
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