Add TX-Button to inFactory-TH

src/devices/infactory.c

@@ -10,11 +10,17 @@
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.
 */
-/**
+
+#include "decoder.h"
+
+/** @fn int infactory_decode(r_device *decoder, bitbuffer_t *bitbuffer)
+inFactory outdoor temperature and humidity sensor.
+
 Outdoor sensor, transmits temperature and humidity data
 - inFactory NC-3982-913/NX-5817-902, Pearl (for FWS-686 station)
 - nor-tec 73383 (weather station + sensor), Schou Company AS, Denmark
 - DAY 73365 (weather station + sensor), Schou Company AS, Denmark
+- Tchibo NC-3982-675
 
 Known brand names: inFactory, nor-tec, GreenBlue, DAY. Manufacturer in China.
 
@@ -26,7 +32,7 @@ Transmissions includes an id. Every 60 seconds the sensor transmits 6 packets:
 
 - i: identification // changes on battery switch
 - c: CRC-4 // CCITT checksum, see below for computation specifics
-- u: unknown // (sometimes set at power-on, but not always)
+- u: TX-button, also set for 3 sec at power-up
 - b: battery low // flag to indicate low battery voltage
 - h: Humidity // BCD-encoded, each nibble is one digit, 'A0' means 100%rH
 - t: Temperature // in °F as binary number with one decimal place + 90 °F offset
@@ -45,8 +51,6 @@ Payload looks like this:
 (See below for more information about the signal timing.)
 */
 
-#include "decoder.h"
-
 static int infactory_crc_check(uint8_t *b)
 {
  uint8_t msg_crc, crc, msg[5];
@@ -60,21 +64,22 @@ static int infactory_crc_check(uint8_t *b)
  return (crc == msg_crc);
 }
 
-static int infactory_callback(r_device *decoder, bitbuffer_t *bitbuffer)
+static int infactory_decode(r_device *decoder, bitbuffer_t *bitbuffer)
 {
  if (bitbuffer->bits_per_row[0] != 40)
  return DECODE_ABORT_LENGTH;
 
  uint8_t *b = bitbuffer->bb[0];
 
- /* Check that the last 4 bits of message are not 0 (channel number 1 - 3) */
+ // Check that the last 4 bits of message are not 0 (channel number 1 - 3)
  if (!(b[4] & 0x0F))
  return DECODE_ABORT_EARLY;
 
  if (!infactory_crc_check(b))
  return DECODE_FAIL_MIC;
 
  int id = b[0];
+ int button = (b[1] >> 3) & 1;
  int battery_low = (b[1] >> 2) & 1;
  int temp_raw = (b[2] << 4) | (b[3] >> 4);
  int humidity = (b[3] & 0x0F) * 10 + (b[4] >> 4); // BCD, 'A0'=100%rH
@@ -88,6 +93,7 @@ static int infactory_callback(r_device *decoder, bitbuffer_t *bitbuffer)
  "id", "ID", DATA_INT, id,
  "channel", "Channel", DATA_INT, channel,
  "battery_ok", "Battery", DATA_INT, !battery_low,
+ "button", "Button", DATA_INT, button,
  "temperature_F", "Temperature", DATA_FORMAT, "%.2f F", DATA_DOUBLE, temp_f,
  "humidity", "Humidity", DATA_FORMAT, "%u %%", DATA_INT, humidity,
  "mic", "Integrity", DATA_STRING, "CRC",
@@ -103,6 +109,7 @@ static char const *const output_fields[] = {
  "id",
  "channel",
  "battery_ok",
+ "button",
  "temperature_F",
  "humidity",
  "mic",
@@ -138,6 +145,6 @@ r_device const infactory = {
  .long_width = 4000, // Width of a '1' gap
  .reset_limit = 5000, // Maximum gap size before End Of Message [us]
  .tolerance = 750, // Width interval 0=[1250..2750] 1=[3250..4750], should be quite robust
- .decode_fn = &infactory_callback,
+ .decode_fn = &infactory_decode,
  .fields = output_fields,
 };