src/devices/springfield.c

   1 #include "rtl_433.h"
   2 #include "data.h"
   3 #include "util.h"
   4
   5 // Actually 37 bits for all but last transmission which is 36 bits
   6 #define NUM_BITS        36
   7
   8 static int springfield_callback(bitbuffer_t *bitbuffer) {
   9         int ret = 0;
  10         char time_str[LOCAL_TIME_BUFLEN];
  11         int row;
  12         int cs;
  13         int i;
  14         int nibble[NUM_BITS/4+1];
  15         int sid, battery, transmit, channel, temp;
  16         float tempC;
  17         int moisture, uk1;
  18         int checksum;
  19         data_t *data;
  20         long tmpData;
  21         long savData = 0;
  22
  23         local_time_str(0, time_str);
  24
  25         for(row = 0; row < bitbuffer->num_rows; row++) {
  26                 if(bitbuffer->bits_per_row[row] == NUM_BITS || bitbuffer->bits_per_row[row] == NUM_BITS + 1) {
  27                         cs = 0;
  28                         tmpData = (bitbuffer->bb[row][0] << 24) + (bitbuffer->bb[row][1] << 16) + (bitbuffer->bb[row][2] << 8) + bitbuffer->bb[row][3];
  29                         for(i = 0; i < (NUM_BITS/4); i++) {
  30                                 if((i & 0x01) == 0x01)
  31                                         nibble[i] = bitbuffer->bb[row][i >> 1] & 0x0f;
  32                                 else
  33                                         nibble[i] = bitbuffer->bb[row][i >> 1] >> 0x04;
  34                                 if(i < 7) cs ^= nibble[i];
  35                         }
  36                         cs = (cs & 0xF);
  37                         checksum = nibble[7];
  38                         if(checksum == cs && tmpData != savData) {
  39                                 savData = tmpData;
  40                                 sid      = (nibble[0] << 4) + nibble[1];
  41                                 battery  = (nibble[2] >> 3) & 0x01;
  42                                 transmit = (nibble[2] >> 2) & 0x01;
  43                                 channel  = (nibble[2] & 0x03) + 1;
  44                                 temp     = ((nibble[3] << 8) + (nibble[4] << 4) + nibble[5]);
  45                                 if(temp >= 0xf00) temp = temp - 0x1000;
  46                                 tempC    = temp / 10.0;
  47                                 moisture =  nibble[6];
  48                                 uk1      =  nibble[8];  /* unknown. */
  49
  50                                 data = data_make(
  51                                         "time",                 "",                             DATA_STRING,    time_str,
  52                                         "model",                "",                             DATA_STRING,    "Springfield Temperature & Moisture",
  53                                         "sid",                  "SID",                  DATA_INT,               sid,
  54                                         "channel",              "Channel",              DATA_INT,               channel,
  55                                         "battery",              "Battery",              DATA_STRING,    battery ? "LOW" : "OK",
  56                                         "transmit",             "Transmit",             DATA_STRING,    transmit ? "MANUAL" : "AUTO",
  57                                         "temperature_C","Temperature",  DATA_FORMAT,    "%.01f C",                              DATA_DOUBLE,    tempC,
  58                                         "moisture",             "Moisture",             DATA_INT,               moisture,
  59 //                                      "uk1",                  "uk1",                  DATA_INT,               uk1,
  60                                         NULL);
  61                                 data_acquired_handler(data);
  62                                 ret++;
  63                         }
  64                 }
  65         }
  66         return ret;
  67 }
  68
  69 static char *output_fields[] = {
  70   "time",
  71   "model",
  72   "sid",
  73   "channel",
  74   "battery",
  75   "transmit",
  76   "temperature_C",
  77   "moisture",
  78   NULL
  79 };
  80
  81 r_device springfield = {
  82   .name           = "Springfield Temperature and Soil Moisture",
  83   .modulation     = OOK_PULSE_PPM_RAW,
  84   .short_limit    = 500 * 4,
  85   .long_limit     = 1000 * 4,
  86   .reset_limit    = 2300 * 4,
  87   .json_callback  = &springfield_callback,
  88   .disabled       = 0,
  89   .demod_arg      = 0,
  90   .fields         = output_fields
  91 };