int main()
{
signal(SIGINT, sig_handler);
//! [Interesting]
// Instantiate a SHT1X sensor using D2 as the clock, and D3 as the
// data pin.
sht1x_context sensor = sht1x_init(2, 3);
if (!sensor)
{
printf("sht1x_init() failed.\n");
return 1;
}
// Every 2 seconds, update and print values
while (shouldRun)
{
if (sht1x_update(sensor))
{
printf("sht1x_update() failed, exiting.\n");
break;
}
printf("Temperature: %f C\n", sht1x_get_temperature(sensor));
printf("Humidity: %f RH\n", sht1x_get_humidity(sensor));
printf("\n");
upm_delay(2);
}
//! [Interesting]
printf("Exiting\n");
sht1x_close(sensor);
return 0;
}
int main(int argc, char *argv[]) {
struct sht1x_device *devices = NULL;
struct sht1x_device *current = NULL;
int err, status, i;
if (argc < 2) {
printf("Usage: %s 1-2.3.4 [1-2.3.5] [2-6.1]\n", argv[0]);
status = EXIT_FAILURE;
goto done;
}
for (i = 1; i < argc; i++) {
char config[4096];
FILE *cfg_fd;
current = malloc(sizeof(struct sht1x_device));
if (current == NULL) {
status = EXIT_FAILURE;
goto closeall;
}
current->next = devices;
devices = current;
strncpy(current->name, argv[i], sizeof(current->name));
snprintf(current->rrdfile, sizeof(current->rrdfile), "%s.rrd", argv[i]);
sht1x_open(current);
temperhum_rrd_create(current->rrdfile);
current->tc_offset = 0;
snprintf(config, sizeof(config), "%s.conf", current->name);
errno = 0;
cfg_fd = fopen(config, "r");
if (cfg_fd != NULL) {
char buf[1024];
if (fgets(buf, sizeof(buf), cfg_fd) != NULL) {
errno = 0;
current->tc_offset = strtod(buf, NULL);
if (errno != 0) {
fprintf(stderr, "Error reading config for %s (%s)\n", current->name, strerror(errno));
status = EXIT_FAILURE;
goto closeall;
}
}
fclose(cfg_fd);
} else if (errno != ENOENT) {
fprintf(stderr, "Error opening config for %s (%s)\n", current->name, strerror(errno));
status = EXIT_FAILURE;
goto closeall;
}
err = sht1x_device_reset(current);
if (err) {
fprintf(stderr, "Error resetting device %s\n", current->name);
status = EXIT_FAILURE;
goto closeall;
}
current->status = sht1x_read_status(current);
if (!current->status.valid) {
fprintf(stderr, "Status read failed for %s\n", current->name);
status = EXIT_FAILURE;
goto closeall;
} else {
printf("%s; Status {"
"Battery: %s, "
"Heater: %s, "
"Reload: %s, "
"Resolution: %s }\n",
current->name,
current->status.low_battery == 0 ? "OK" : "LOW",
current->status.heater == 0 ? "OFF" : "ON",
current->status.no_reload == 0 ? "YES" : "NO",
current->status.low_resolution == 0 ? "HIGH" : "LOW");
if (current->status.low_resolution || current->status.heater) {
current->status.low_resolution = 0;
current->status.heater = 0;
if (sht1x_write_status(current, current->status)) {
fprintf(stderr, "Status write failed for %s\n", current->name);
status = EXIT_FAILURE;
goto closeall;
}
}
}
}
signal(SIGINT, temperhum_stop);
signal(SIGTERM, temperhum_stop);
while(!stop) {
struct sht1x_readings readings;
struct timespec tp;
if (current == NULL)
current = devices;
readings = sht1x_getreadings(current, current->status.low_resolution);
clock_gettime(CLOCK_REALTIME, &tp);
printf("%lu.%09lu/%10s; T %6.2lf℃ / RH %6.2lf%% / DP %6.2lf℃\n", tp.tv_sec, tp.tv_nsec, current->name, readings.temperature_celsius, readings.relative_humidity, readings.dew_point);
temperhum_rrd_update(current->rrdfile, tp.tv_sec, readings);
current = current->next;
}
status = EXIT_SUCCESS;
closeall:
while (devices != NULL) {
current = devices;
sht1x_close(current);
devices = current->next;
free(current);
}
done:
exit(status);
}