Add support for BMW Gen5 TPMS multi-brand HUF, Continental, Schrader/Sensata (#2834)
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Bruno OCTAU
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5 changed files with 155 additions and 0 deletions
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@ -337,6 +337,7 @@ See [CONTRIBUTING.md](./docs/CONTRIBUTING.md).
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[249] Bresser lightning
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[250] Schou 72543 Day Rain Gauge, Motonet MTX Rain, MarQuant Rain Gauge
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[251] Fine Offset / Ecowitt WH55 water leak sensor
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[252] BMW Gen5 TPMS, multi-brand HUF, Continental, Schrader/Sensata
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* Disabled by default, use -R n or a conf file to enable
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@ -478,6 +478,7 @@ convert si
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protocol 249 # Bresser lightning
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protocol 250 # Schou 72543 Day Rain Gauge, Motonet MTX Rain, MarQuant Rain Gauge
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protocol 251 # Fine Offset / Ecowitt WH55 water leak sensor
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protocol 252 # BMW Gen5 TPMS, multi-brand HUF, Continental, Schrader/Sensata
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## Flex devices (command line option "-X")
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@ -259,6 +259,7 @@
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DECL(bresser_lightning) \
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DECL(schou_72543_rain) \
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DECL(fineoffset_wh55) \
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DECL(tpms_bmw) \
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/* Add new decoders here. */
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@ -232,6 +232,7 @@ add_library(r_433 STATIC
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devices/thermopro_tx2c.c
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devices/tpms_abarth124.c
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devices/tpms_ave.c
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devices/tpms_bmw.c
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devices/tpms_citroen.c
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devices/tpms_eezrv.c
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devices/tpms_elantra2012.c
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151
src/devices/tpms_bmw.c
Normal file
151
src/devices/tpms_bmw.c
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@ -0,0 +1,151 @@
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/** @file
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BMW Gen5 TPMS sensor.
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Copyright (C) 2024 Bruno OCTAU (ProfBoc75), \@petrjac, Christian W. Zuckschwerdt <christian@zuckschwerdt.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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*/
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/**
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BMW Gen5 TPMS sensor.
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issue #2821 BMW Gen5 TPMS support open by \@petrjac
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Samples raw :
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555554b2aab4b2b552acb4d332accb32b552aaacd334d32ad334
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555554b2aab4b2b552acb4d332acb4cab54caaacd4cad32b4b55
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- Preamble {16} 0xaa59 before MC
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- MC Zero bit coded, 11 bytes
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Samples after MC Inverted:
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0 1 2 3 4 5 6 7 8 9 10
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MM II II II II PP TT F1 F2 F3 CC
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03 23 e1 36 a1 4a 3e 01 6b 68 6b
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03 23 e1 36 a1 34 3d 01 74 68 cf
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- MM : Brand BRAND ID, 0x03 = HUF Gen 5, 0x23 = Schrader/Sensata, 0x80 = Continental
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- II : Sensor ID
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- PP : Pressure * 2.45 kPa
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- TT : Temp - 52 C
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- F1 : Warning Flags , battery, fast deflating ... not yet guess
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- F2 : Sequence number, to be confirmed
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- F3 : Target Nominal Pressure * 0.0245 for 0x03
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- CC : CRC 8 of 10 byte, init 0xaa , poli 0x2f
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Data layout after MC for HUF Gen 5:
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BRAND = 8h | SENSOR_ID = 32h | PRESS = 8d | TEMP = 8d | FLAGS1 = 8h | FLAGS2 = 8h | FLAGS3 = 8d | CRC = 8h
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BRAND = 03 | SENSOR_ID = 23e136a1 | PRESS = 074 | TEMP = 062 | FLAGS1 = 01 | FLAGS2 = 6b | FLAGS3 = 104 | CRC = 6b
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BRAND = 03 | SENSOR_ID = 23e136a1 | PRESS = 052 | TEMP = 061 | FLAGS1 = 01 | FLAGS2 = 74 | FLAGS3 = 104 | CRC = cf
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Continental model:
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F1, F2, F3 to guess
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Schrader/Sensata model:
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F1, F2, F3 to guess
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*/
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#include "decoder.h"
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static int tpms_bmw_decode(r_device *decoder, bitbuffer_t *bitbuffer)
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{
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bitbuffer_t decoded = { 0 };
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uint8_t *b;
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// preamble is aa59
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uint8_t const preamble_pattern[] = {0xaa, 0x59};
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if (bitbuffer->num_rows != 1) {
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decoder_logf(decoder, 2, __func__, "row error");
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return DECODE_ABORT_EARLY;
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}
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int pos = 0;
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pos = bitbuffer_search(bitbuffer, 0, 0, preamble_pattern, sizeof(preamble_pattern) * 8);
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if (pos >= bitbuffer->bits_per_row[0]) {
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decoder_logf(decoder, 2, __func__, "Preamble not found");
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return DECODE_ABORT_EARLY;
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}
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decoder_log_bitrow(decoder, 2, __func__, bitbuffer->bb[0], bitbuffer->bits_per_row[0], "MSG");
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bitbuffer_manchester_decode(bitbuffer, 0, pos + sizeof(preamble_pattern) * 8, &decoded, 11 * 8);
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decoder_log_bitrow(decoder, 2, __func__, decoded.bb[0], decoded.bits_per_row[0], "MC");
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if (decoded.bits_per_row[0] < 88) {
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decoder_logf(decoder, 1, __func__, "Too short");
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return DECODE_ABORT_LENGTH;
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}
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bitbuffer_invert(&decoded); // MC Zerobit
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decoder_log_bitrow(decoder, 2, __func__, decoded.bb[0], decoded.bits_per_row[0], "MC inverted");
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b = decoded.bb[0];
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if (crc8(b, 11, 0x2f, 0xaa)) {
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decoder_logf(decoder, 1, __func__, "crc error, expected %02x, calculated %02x", b[11], crc8(b, 11, 0x2f, 0xaa));
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return DECODE_FAIL_MIC; // crc mismatch
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}
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decoder_log(decoder, 2, __func__, "BMW found");
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int brand_id = b[0]; // 0x03 = HUF Gen 5, 0x80 = Continental, 0x23 = Sensata, 0x88 = ??
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float pressure_kPa = b[5] * 2.45;
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int temperature_C = b[6] - 52;
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int flags1 = b[7]; // depends on brand_id, could be pressure or SEQ ID and other WARM flags Battery , fast deflating ...
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int flags2 = b[8]; // depends on brand_id, could be pressure and other WARM flags Battery , fast deflating ...
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int flags3 = b[9]; // Nominal Pressure for brand HUF 0x03, depends on brand_id, could be SEQ ID and other WARM flags Battery , fast deflating ...
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char id_str[9];
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snprintf(id_str, sizeof(id_str), "%02x%02x%02x%02x", b[1], b[2], b[3], b[4]);
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char msg_str[23];
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snprintf(msg_str, sizeof(msg_str), "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x", b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7], b[8], b[9], b[10]);
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/* clang-format off */
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data_t *data = data_make(
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"model", "", DATA_STRING, "BMW-GEN5",
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"type", "", DATA_STRING, "TPMS",
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"brand", "Brand", DATA_INT, brand_id,
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"id", "", DATA_STRING, id_str,
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"pressure_kPa", "Pressure", DATA_FORMAT, "%.1f kPa", DATA_DOUBLE, (double)pressure_kPa,
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"temperature_C", "Temperature", DATA_FORMAT, "%.1f C", DATA_DOUBLE, (double)temperature_C,
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"flags1", "", DATA_INT, flags1,
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"flags2", "", DATA_INT, flags2,
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"flags3", "", DATA_INT, flags3, // Nominal Pressure for brand HUF 0x03
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"msg", "msg", DATA_STRING, msg_str, // To remove after guess all tags
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"mic", "Integrity", DATA_STRING, "CRC",
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NULL);
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/* clang-format on */
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decoder_output_data(decoder, data);
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return 1;
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}
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static char const *const output_fields[] = {
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"model",
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"type",
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"id",
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"brand",
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"battery_ok",
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"pressure_kPa",
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"flags1",
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"flags2",
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"flags3",
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"msg",
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"mic",
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NULL,
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};
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r_device const tpms_bmw = {
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.name = "BMW Gen5 TPMS, multi-brand HUF, Continental, Schrader/Sensata",
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.modulation = FSK_PULSE_PCM,
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.short_width = 25,
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.long_width = 25,
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.reset_limit = 100,
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.decode_fn = &tpms_bmw_decode,
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.fields = output_fields,
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};
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