Add support for Aston Martin Smartire TPMS sensor, Vantage DB9 protocol

README.md

@@ -351,6 +351,7 @@ See [CONTRIBUTING.md](./docs/CONTRIBUTING.md).
     [263]  Vevor Wireless Weather Station 7-in-1
     [264]  Arexx Multilogger IP-HA90, IP-TH78EXT, TSN-70E
     [265]  Rosstech Digital Control Unit DCU-706/Sundance/Jacuzzi
+    [266]  SmarTire TPMS sensor, Aston Martin/Vantage DB9 protocol
 
 * Disabled by default, use -R n or a conf file to enable
 

conf/rtl_433.example.conf

@@ -492,6 +492,7 @@ convert si
   protocol 263 # Vevor Wireless Weather Station 7-in-1
   protocol 264 # Arexx Multilogger IP-HA90, IP-TH78EXT, TSN-70E
   protocol 265 # Rosstech Digital Control Unit DCU-706/Sundance/Jacuzzi
+  protocol 266 # SmarTire TPMS sensor, Aston Martin/Vantage DB9 protocol
 
 ## Flex devices (command line option "-X")
 

include/rtl_433_devices.h

@@ -273,6 +273,7 @@
     DECL(vevor_7in1) \
     DECL(arexx_ml) \
     DECL(rosstech_dcu706) \
+    DECL(tpms_smartire) \
 
     /* Add new decoders here. */
 

src/CMakeLists.txt

@@ -257,6 +257,7 @@ add_library(r_433 STATIC
     devices/tpms_porsche.c
     devices/tpms_renault.c
     devices/tpms_renault_0435r.c
+    devices/tpms_smartire.c
     devices/tpms_toyota.c
     devices/tpms_truck.c
     devices/tpms_tyreguard400.c

src/devices/tpms_smartire.c

@@ -0,0 +1,151 @@
+/** @file
+    SmarTire TPMS sensor.
+
+    Copyright (C) 2024 Bruno OCTAU (ProfBoc75)
+
+    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.
+*/
+
+#include "decoder.h"
+
+/**
+SmarTire TPMS sensor.
+- SmarTire Vantage / Aston Martin DB9 protocol, from 1/2005 till 12/2011
+
+S.a. issue #3067
+
+Data Layout:
+- Total of 10 messages at a time, OOK PCM and Differential MC coded.
+- 2 types of message have been identified.
+- 1 Message with Pressure information follow by
+- 1 Message with Temperature information
+- Both messages are repeated 5 times
+- In case of fast pressure increasing, the pressure message is sent with Fast increased flag, then the 10 messages each 2 seconds with the flag.
+
+Flex decoder:
+
+    rtl_433 -X 'n=SmarTire-AM,m=OOK_PCM,s=167,l=167,r=600,preamble=32b4,decode_dm'
+
+Preamble/Syncword  .... : 0x32b4
+
+    6 bytes message
+    Byte Position   0  1  2  3  4  5
+    Sample         28 3f ff ff 00 fa
+                   VV |I II II || CC
+                      |        ||
+                 +----+-+  +----------+
+                 | 1234 |  | 12345678 |
+                 | MMII |  | FFFFFFXX |
+                 +------+  +----------+
+
+- VV: {8} Pressure value, offset 40, scale 2.5 if Message Type = 0x00
+          Temperature Value, offset 40,        if Message Type = 0x01
+- MM: {2} Message Type, 0b00 or 0b01
+- II:{22} Sensor ID,
+- F : {8} Flags, F1 = quick inflate detected,
+                 F2 to F6 are unknown,
+                 X78:{2} Looks like XOR/checksum/Parity from previous bits, not decoded.
+- C : {7} CRC-7, poly 0x45, init 0x6f, final XOR 0x00
+
+Bitbench:
+
+    TEMP/PRESSURE 8d MESSAGE_TYPE 2b ID 22d FAST_INCREASE 1b FLAGS ? 5b PARITY_XOR ? 2b CRC_SEVEN 7b 1x
+
+*/
+
+static int tpms_smartire_decode(r_device *decoder, bitbuffer_t *bitbuffer)
+{
+    bitbuffer_t decoded = { 0 };
+    uint8_t *b;
+    uint8_t const preamble_pattern[] = {0x32, 0xb4};
+    uint8_t len_msg = 6;
+    float pressure_kPa = 0;
+    int temperature_C = 0;
+
+    if (bitbuffer->num_rows != 1) {
+        return DECODE_ABORT_EARLY;
+    }
+
+    int pos = bitbuffer_search(bitbuffer, 0, 0, preamble_pattern, sizeof(preamble_pattern) * 8);
+    if (pos >= bitbuffer->bits_per_row[0]) {
+        decoder_logf(decoder, 1, __func__, "Preamble not found");
+        return DECODE_ABORT_EARLY;
+    }
+
+    decoder_log_bitrow(decoder, 1, __func__, bitbuffer->bb[0], bitbuffer->bits_per_row[0], "MSG");
+    bitbuffer_differential_manchester_decode(bitbuffer, 0, pos + sizeof(preamble_pattern) * 8, &decoded, len_msg * 8);
+    decoder_log_bitrow(decoder, 1, __func__, decoded.bb[0], decoded.bits_per_row[0], "DMC");
+
+    // check msg length
+    if (decoded.bits_per_row[0] < (len_msg * 8) - 1 ) { // always missing last bit
+        decoder_logf(decoder, 1, __func__, "Too short");
+        return DECODE_ABORT_LENGTH;
+    }
+
+    b = decoded.bb[0];
+
+    // verify checksum
+    if (crc7(b, len_msg, 0x45, 0x6f)) {
+        decoder_logf(decoder, 1, __func__, "crc error");
+        return DECODE_FAIL_MIC; // crc mismatch
+    }
+
+    int id       = ((b[1] & 0x3f) << 16) | (b [2] << 8) | b[3];
+    int msg_type = (b[1] & 0xc0) >> 6;
+    int value    = b[0] - 40;
+
+    if (msg_type == 0) { // pressure
+        pressure_kPa = value * 2.5;
+    }
+    else if (msg_type == 1) { // temperature
+        temperature_C = value;
+    }
+    else {
+        decoder_logf(decoder, 1, __func__, "Unknown message type %x", msg_type);
+        return DECODE_ABORT_EARLY;
+    }
+
+    int inflate = (b[4] & 0x80) >> 7;
+    int flags   = b[4] & 0x7f;
+
+    /* clang-format off */
+    data_t *data = data_make(
+            "model",         "",              DATA_STRING, "SmarTire-AM", // Aston Martin model
+            "type",          "",              DATA_STRING, "TPMS",
+            "id",            "",              DATA_INT,    id,
+            "pressure_kPa",  "Pressure",      DATA_COND, msg_type == 0, DATA_FORMAT, "%.1f kPa", DATA_DOUBLE, (double)pressure_kPa,
+            "temperature_C", "Temperature",   DATA_COND, msg_type == 1, DATA_FORMAT, "%.1f C",   DATA_DOUBLE, (double)temperature_C,
+            "inflate",       "Inflate",       DATA_COND, inflate == 1,  DATA_INT, 1,
+            "flags",         "Flags",         DATA_FORMAT, "%07b", DATA_INT, flags,
+            "mic",           "Integrity",     DATA_STRING, "CRC",
+            NULL);
+    /* clang-format on */
+
+    decoder_output_data(decoder, data);
+    return 1;
+}
+
+static char const *const output_fields[] = {
+        "model",
+        "type",
+        "id",
+        "pressure_kPa",
+        "temperature_C",
+        "inflate",
+        "flags",
+        "mic",
+        NULL,
+};
+
+r_device const tpms_smartire = {
+        .name        = "SmarTire TPMS sensor, Aston Martin/Vantage DB9 protocol",
+        .modulation  = OOK_PULSE_PCM,
+        .short_width = 167,
+        .long_width  = 167,
+        .reset_limit = 1000,
+        .decode_fn   = &tpms_smartire_decode,
+        .fields      = output_fields,
+};