src/devices/current_cost.c

   1 #include "rtl_433.h"
   2 #include "pulse_demod.h"
   3 #include "util.h"
   4 #include "data.h"
   5
   6 static int current_cost_callback(bitbuffer_t *bitbuffer) {
   7     bitbuffer_invert(bitbuffer);
   8     bitrow_t *bb = bitbuffer->bb;
   9     uint8_t *b = bb[0];
  10
  11     char time_str[LOCAL_TIME_BUFLEN];
  12     data_t *data;
  13     local_time_str(0, time_str);
  14
  15     uint8_t init_pattern[] = {
  16       0b11001100, //8
  17       0b11001100, //16
  18       0b11001100, //24
  19       0b11001110, //32
  20       0b10010001, //40
  21       0b01011101, //45 (! last 3 bits is not init)
  22     };
  23     unsigned int start_pos = bitbuffer_search(bitbuffer, 0, 0, init_pattern, 45);
  24
  25     if(start_pos == bitbuffer->bits_per_row[0]){
  26         return 0;
  27     }
  28     start_pos += 45;
  29
  30     bitbuffer_t packet_bits = {0};
  31
  32     start_pos = bitbuffer_manchester_decode(bitbuffer, 0, start_pos, &packet_bits, 0);
  33
  34     uint8_t *packet = packet_bits.bb[0];
  35     // Read data
  36     if(packet_bits.bits_per_row[0] >= 56 && ((packet[0] & 0xf0) == 0) ){
  37                     uint16_t device_id = (packet[0] & 0x0f) << 8 | packet[1];
  38
  39         uint16_t watt0 = (packet[2] & 0x7F) << 8 | packet[3] ;
  40         uint16_t watt1 = (packet[4] & 0x7F) << 8 | packet[5] ;
  41         uint16_t watt2 = (packet[6] & 0x7F) << 8 | packet[7] ;
  42         data = data_make("time",          "",       DATA_STRING, time_str,
  43                 "model",         "",              DATA_STRING, "CurrentCost TX", //TODO: it may have different CC Model ? any ref ?
  44                 //"rc",            "Rolling Code",  DATA_INT, rc, //TODO: add rolling code b[1] ? test needed
  45                                                                 "dev_id",       "Device Id",     DATA_FORMAT, "%d", DATA_INT, device_id,
  46                 "power0",       "Power 0",       DATA_FORMAT, "%d W", DATA_INT, watt0,
  47                 "power1",       "Power 1",       DATA_FORMAT, "%d W", DATA_INT, watt1,
  48                 "power2",       "Power 2",       DATA_FORMAT, "%d W", DATA_INT, watt2,
  49                 //"battery",       "Battery",       DATA_STRING, battery_low ? "LOW" : "OK", //TODO is there some low battery indicator ?
  50                 NULL);
  51         data_acquired_handler(data);
  52         return 1;
  53     }
  54     return 0;
  55 }
  56
  57 static char *output_fields[] = {
  58     "time",
  59     "model",
  60     "rc",
  61     "power0",
  62     "power1",
  63     "power2",
  64     NULL
  65 };
  66
  67 r_device current_cost = {
  68     .name           = "CurrentCost Current Sensor",
  69     .modulation     = FSK_PULSE_PCM,
  70     .short_limit    = 250,
  71     .long_limit     = 250, // NRZ
  72     .reset_limit    = 8000,
  73     .json_callback  = &current_cost_callback,
  74     .disabled       = 0,
  75     .fields         = output_fields,
  76 };