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Add support for the Acurite temperature and humidity sensor

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This commit is contained in:
Paul F-Y 2014-10-05 16:06:24 -04:00
parent 1e110cec30
commit c1474c3f03
1 changed files with 40 additions and 0 deletions

40
src/rtl_433.c
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@ -782,6 +782,35 @@ static int lacrossetx_callback(uint8_t bb[BITBUF_ROWS][BITBUF_COLS]) {
}
static int acurite_th_detect(uint8_t *buf){
if(buf[5] != 0) return 0;
uint8_t sum = (buf[0] + buf[1] + buf[2] + buf[3]) & 0xff;
if(sum == 0) return 0;
return sum == buf[4];
}
static float acurite_th_temperature(uint8_t *s){
uint16_t shifted = (((s[1] & 0x0f) << 8) | s[2]) << 4; // Logical left shift
return (((int16_t)shifted) >> 4) / 10.0; // Arithmetic right shift
}
static int acurite_th_callback(uint8_t bb[BITBUF_ROWS][BITBUF_COLS]) {
uint8_t *buf = NULL;
int i;
for(i = 0; i < BITBUF_ROWS; i++){
if(acurite_th_detect(bb[i])){
buf = bb[i];
break;
}
}
if(buf){
fprintf(stderr, "Temperature event:\n");
fprintf(stderr, "protocol = Acurite Temp&Humidity\n");
fprintf(stderr, "temp = %.1f°C\n", acurite_th_temperature(buf));
fprintf(stderr, "humidity = %d%%\n\n", buf[3]);
return 1;
}
return 0;
}
// timings based on samp_rate=1024000
r_device rubicson = {
@ -905,6 +934,16 @@ r_device lacrossetx = {
/* .json_callback = */ &lacrossetx_callback,
};
r_device acurite_th = {
/* .id = */ 11,
/* .name = */ "Acurite Temperature and Humidity Sensor",
/* .modulation = */ OOK_PWM_D,
/* .short_limit = */ 300,
/* .long_limit = */ 550,
/* .reset_limit = */ 2500,
/* .json_callback = */ &acurite_th_callback,
};
struct protocol_state {
int (*callback)(uint8_t bits_buffer[BITBUF_ROWS][BITBUF_COLS],int16_t bits_per_row[BITBUF_ROWS]);
@ -1777,6 +1816,7 @@ int main(int argc, char **argv)
register_protocol(demod, &steffen);
register_protocol(demod, &acurite5n1);
register_protocol(demod, &lacrossetx);
register_protocol(demod, &acurite_th);
if (argc <= optind-1) {
usage();