#include "rtl_433.h"
-
+#include "data.h"
+#include "util.h"
/* Currently this can decode the temperature and id from Rubicson sensors
*
* the sensor sends 36 bits 12 times pwm modulated
* the data is grouped into 9 nibles
- * [id0] [id1], [unk0] [temp0], [temp1] [temp2], [unk1] [unk2], [unk3]
+ * [id0] [id1], [bat|unk1|chan1|chan2] [temp0], [temp1] [temp2], [F] [crc1], [crc2]
*
* The id changes when the battery is changed in the sensor.
- * unk0 is always 1 0 0 0, most likely 2 channel bits as the sensor can recevice 3 channels
- * unk1-3 changes and the meaning is unknown
+ * bat bit is 1 if battery is ok, 0 if battery is low
+ * chan1 and chan2 forms a 2bit value for the used channel
+ * unk1 is always 0 probably unused
* temp is 12 bit signed scaled by 10
+ * F is always 0xf
+ * crc1 and crc2 forms a 8-bit crc
*
* The sensor can be bought at Kjell&Co
*/
-static int rubicson_callback(uint8_t bb[BITBUF_ROWS][BITBUF_COLS],int16_t bits_per_row[BITBUF_ROWS]) {
+
+/* Working routine for checking the crc, lots of magic but it works */
+
+//static uint8_t rp[] = {0xb8, 0x80, 0xea, 0xfe, 0x80};
+static uint8_t rp[] = {0xea, 0x8f, 0x6a, 0xfa, 0x50};
+
+int rubicson_crc_check(bitrow_t *bb) {
+ uint8_t crc, w;
+ uint8_t diff[9];
+ int i, ret;
+
+ // diff against ref packet
+
+ diff[0] = rp[0]^bb[1][0];
+ diff[1] = rp[1]^bb[1][1];
+ diff[2] = rp[2]^bb[1][2];
+ diff[3] = rp[3]^bb[1][3];
+ diff[4] = rp[4]^bb[1][4];
+
+// fprintf(stdout, "%02x %02x %02x %02x %02x\n",rp[0],rp[1],rp[2],rp[3],rp[4]);
+// fprintf(stdout, "%02x %02x %02x %02x %02x\n",bb[1][0],bb[1][1],bb[1][2],bb[1][3],bb[1][4]);
+// fprintf(stdout, "%02x %02x %02x %02x %02x\n",diff[0],diff[1],diff[2],diff[3],diff[4]);
+
+ for (crc = 0, w = 0xf1, i = 0; i<7 ; i++){
+ uint8_t c = diff[i/2];
+ unsigned digit = (i&1) ? c&0xF : (c&0xF0)>>4;
+ unsigned j;
+ for (j=4; j-->0; ) {
+ if ((digit >> j) & 1)
+ crc ^= w;
+ w = (w >> 1) ^ ((w & 1) ? 0x98: 0);
+ }
+ }
+ if (crc == (((diff[3]<<4)&0xF0) | (diff[4]>>4)))
+// printf ("\ncrc ok: %x\n", crc);
+ ret = 1;
+ else
+// printf ("\ncrc fail: %x\n", crc);
+ ret = 0;
+
+ return ret;
+};
+
+static int rubicson_callback(bitbuffer_t *bitbuffer) {
+ bitrow_t *bb = bitbuffer->bb;
int temperature_before_dec;
- int temperature_after_dec;
+ int temperature_after_dec, i;
int16_t temp;
+ int8_t rh, csum, csum_calc, sum=0;
+ unsigned bits = bitbuffer->bits_per_row[0];
+ data_t *data;
+
+ char time_str[LOCAL_TIME_BUFLEN];
+ uint8_t channel;
+ uint8_t sensor_id;
+ uint8_t battery;
+ float temp_c;
+
+ if (!(bits == 36))
+ return 0;
- /* FIXME validate the received message better, figure out crc */
- if (bb[1][0] == bb[2][0] && bb[2][0] == bb[3][0] && bb[3][0] == bb[4][0] &&
- bb[4][0] == bb[5][0] && bb[5][0] == bb[6][0] && bb[6][0] == bb[7][0] && bb[7][0] == bb[8][0] &&
- bb[8][0] == bb[9][0] && (bb[5][0] != 0 && bb[5][1] != 0 && bb[5][2] != 0)) {
+ if (rubicson_crc_check(bb)) {
+ local_time_str(0, time_str);
/* Nible 3,4,5 contains 12 bits of temperature
* The temerature is signed and scaled by 10 */
temp = (int16_t)((uint16_t)(bb[0][1] << 12) | (bb[0][2] << 4));
temp = temp >> 4;
- temperature_before_dec = abs(temp / 10);
- temperature_after_dec = abs(temp % 10);
+ channel = ((bb[0][1]&0x30)>>4)+1;
+ battery = (bb[0][1]&0x80);
+ sensor_id = bb[0][0];
+ temp_c = (float) temp / 10.0;
- fprintf(stdout, "SENSOR:TYPE=RUBICSON,");
- fprintf(stdout, "ID=%x,",bb[0][0]);
- fprintf(stdout, "TEMPERATURE=%s%d.%d\n",temp<0?"-":"",temperature_before_dec, temperature_after_dec);
- fprintf(stderr, "%02x %02x %02x %02x %02x\n",bb[1][0],bb[0][1],bb[0][2],bb[0][3],bb[0][4]);
-
- if (debug_output)
- debug_callback(bb, bits_per_row);
+ data = data_make("time", "", DATA_STRING, time_str,
+ "model", "", DATA_STRING, "Rubicson Temperature Sensor",
+ "id", "House Code", DATA_INT, sensor_id,
+ "channel", "Channel", DATA_INT, channel,
+ "battery", "Battery", DATA_STRING, battery ? "OK" : "LOW",
+ "temperature_C", "Temperature", DATA_FORMAT, "%.1f C", DATA_DOUBLE, temp_c,
+ "crc", "CRC", DATA_STRING, "OK",
+ NULL);
+ data_acquired_handler(data);
return 1;
}
return 0;
}
+static char *output_fields[] = {
+ "time",
+ "model",
+ "id",
+ "channel",
+ "battery",
+ "temperature_C",
+ "crc",
+ NULL
+};
+
+
// timings based on samp_rate=1024000
r_device rubicson = {
- /* .id = */ 1,
- /* .name = */ "Rubicson Temperature Sensor",
- /* .modulation = */ OOK_PWM_D,
- /* .short_limit = */ 1744/4,
- /* .long_limit = */ 3500/4,
- /* .reset_limit = */ 5000/4,
- /* .json_callback = */ &rubicson_callback,
+ .name = "Rubicson Temperature Sensor",
+ .modulation = OOK_PULSE_PPM_RAW,
+ .short_limit = 488+970, // Gaps: Short 976µs, Long 1940µs, Sync 4000µs
+ .long_limit = 970+2000, // Pulse: 500µs (Initial pulse in each package is 388µs)
+ .reset_limit = 4800, // Two initial pulses and a gap of 9120µs is filtered out
+ .json_callback = &rubicson_callback,
+ .disabled = 0,
+ .demod_arg = 0,
+ .fields = output_fields,
};
projects / rtl-433.git / blobdiff