src/devices/quhwa.c

   1 /* Quhwa
   2  *
   3  * Tested devices:
   4  * QH-C-CE-3V (which should be compatible with QH-832AC),
   5  * also sold as "1 by One" wireless doorbell
   6  *
   7  * Copyright (C) 2016 Ask Jakobsen
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13 #include "rtl_433.h"
  14 #include "pulse_demod.h"
  15 #include "data.h"
  16 #include "util.h"
  17
  18
  19 static int quhwa_callback(bitbuffer_t *bitbuffer) {
  20         bitrow_t *bb = bitbuffer->bb;
  21         uint8_t *b = bb[0];
  22
  23         b[0] = ~b[0];
  24         b[1] = ~b[1];
  25         b[2] = ~b[2];
  26
  27         unsigned bits = bitbuffer->bits_per_row[0];
  28
  29         if ((bits == 18) &&
  30             ((b[1] & 0x03) == 0x03) &&
  31             ((b[2] & 0xC0) == 0xC0))
  32           {
  33             uint32_t ID = (b[0] << 8) | b[1];
  34             data_t *data;
  35
  36             char time_str[LOCAL_TIME_BUFLEN];
  37             local_time_str(0, time_str);
  38
  39             data = data_make("time", "", DATA_STRING, time_str,
  40                              "model", "", DATA_STRING, "Quhwa doorbell",
  41                              "id", "ID", DATA_INT, ID,
  42                              NULL);
  43
  44             data_acquired_handler(data);
  45
  46             return 1;
  47         }
  48         return 0;
  49 }
  50
  51 static char *output_fields[] = {
  52   "time",
  53   "model",
  54   "id",
  55   NULL
  56 };
  57
  58
  59 PWM_Precise_Parameters pwm_precise_parameters_quhwa = {
  60         .pulse_tolerance        = 20,
  61         .pulse_sync_width       = 0,    // No sync bit used
  62 };
  63
  64 r_device quhwa = {
  65         .name                   = "Quhwa",
  66         .modulation             = OOK_PULSE_PWM_PRECISE,
  67         .short_limit            = 360,  // Pulse: Short 360µs, Long 1070µs
  68         .long_limit             = 1070, // Gaps: Short 360µs, Long 1070µs
  69         .reset_limit            = 1200, // Intermessage Gap 5200µs
  70         .json_callback          = &quhwa_callback,
  71         .disabled               = 0,
  72         .demod_arg              = (uintptr_t)&pwm_precise_parameters_quhwa,
  73 };