Arad Master Meter water utility meter decoder

include/rtl_433_devices.h

@@ -267,6 +267,7 @@
     DECL(tpms_bmwg3) \
     DECL(chamberlain_cwpirc) \
     DECL(thermopro_tp829b) \
+    DECL(arad_ms_meter) \
 
     /* Add new decoders here. */
 

src/CMakeLists.txt

@@ -52,6 +52,7 @@ add_library(r_433 STATIC
     devices/ambientweather_tx8300.c
     devices/ambientweather_wh31e.c
     devices/ant_antplus.c
+    devices/arad_ms_meter.c
     devices/archos_tbh.c
     devices/atech_ws308.c
     devices/auriol_4ld5661.c

src/devices/arad_ms_meter.c

@@ -0,0 +1,108 @@
+/** @file
+
+    Arad/Master Meter Dialog3G water utility meter.
+
+    Copyright (C) 2022 avicarmeli
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+*/
+
+/**
+
+Arad/Master Meter Dialog3G water utility meter.
+
+FCC-Id: TKCET-733
+Massage is being sent once every 30 second.
+The massage look like that:
+00000000FFFFFFFFFFFFFFSSSSSSSSXXCCCCCCXXXF?????????XFF
+where:
+00000000 is preamble.
+FFFFFFFFFFFFFF  is fixed in time and the same for other meters in the neighborhood. Probably gearing ratio. The payload is 3e690aec7ac84b.
+SSSSSSSS  is Meter serial number.  for instance fa1c9073 =>  fa1c90 = 09444602, little endian 73= 'S'
+XX no idea.
+CCCCCC is the counter reading little endian for instance a80600= 1704
+XXX no idea.
+F  is fixed in time and the same for other meters in the neighborhood. With payload of 5.
+????????? probably some kind of CRC or checksum - here is where I need help.
+X is getting either 8 or 0 same for other meters in the neighborhood.
+FF is fixed in time and the same for other meters in the neighborhood.With payload f8.
+
+Format string:
+56x SERIAL: <24dc 8x COUNTER: <24d hhhhhhhhhhhhhh  SUFFIX:hh
+
+*/
+
+#include "decoder.h"
+
+static int arad_mm_dialog3g_decode(r_device *decoder, bitbuffer_t *bitbuffer)
+{
+    uint8_t const preamble_pattern[] = {0x96, 0xf5, 0x13, 0x85, 0x37, 0xb4}; // 48 bit preamble
+    int row;
+    data_t *data;
+    uint8_t mdata[15];
+    bitbuffer_t databits = {0};
+
+    // fprintf(stderr,"arad_mm_dialog3g callback was triggered :-) \n");
+    // bitbuffer_print(bitbuffer);
+
+    row = bitbuffer_find_repeated_row(bitbuffer, 1, 168); // expected 1 row with minimum of 48+120= 168 bits.
+    if (row < 0)
+        return DECODE_ABORT_EARLY;
+
+    unsigned start_pos = bitbuffer_search(bitbuffer, row, 0, preamble_pattern, 48);
+    start_pos += 48; // skip preamble
+
+    if ((bitbuffer->bits_per_row[row] - start_pos) < 120)
+        return DECODE_ABORT_LENGTH; // short buffer or preamble not found
+
+    bitbuffer_invert(bitbuffer);
+
+    // bitbuffer_print(bitbuffer);
+
+    bitbuffer_extract_bytes(bitbuffer, row, start_pos, mdata, 120);
+
+    uint32_t serno    = mdata[0] | (mdata[1] << 8) | (mdata[2] << 16) | (0 << 24); // 24 bit little endian Meter Serial number
+    uint32_t wreadraw = mdata[5] | (mdata[6] << 8) | (mdata[7] << 16) | (0 << 24); // 24 bit little endian Meter water consumption reading
+
+    char sernoout[10];
+
+    sprintf(sernoout, "%08u%c", serno, mdata[3] - 32);
+
+    float wread = wreadraw;
+
+    wread = wread / 10;
+
+    /* clang-format off */
+    data = data_make(
+        "model",       "",               DATA_STRING,    "AradMsMeter-Dialog3G",
+        "id",          "Serial No",      DATA_STRING,    sernoout,
+        "volume_m3",    "Volume",        DATA_FORMAT,    "%.1f m3",  DATA_DOUBLE, wread,
+        //"mic",         "Integrity",      DATA_STRING,    "CHECKSUM",
+        NULL);
+    /* clang-format on */
+
+    decoder_output_data(decoder, data);
+    return 1;
+}
+
+static char const *const output_fields[] = {
+        "model",
+        "id",
+        "waterread",
+        //"mic",
+        NULL,
+};
+
+r_device const arad_ms_meter = {
+        .name        = "Arad/Master Meter Dialog3G water utility meter",
+        .modulation  = FSK_PULSE_MANCHESTER_ZEROBIT,
+        .short_width = 8.4,
+        .long_width  = 0, // not used
+        .reset_limit = 30,
+        .decode_fn   = &arad_mm_dialog3g_decode,
+        .disabled    = 1, // stop debug output from spamming unsuspecting users
+        .fields      = output_fields,
+};