Add support for the Thermopro TP-12. This is based heavily on the code
for the Thermopro TP-11, and the modulation is compatible, but the bit layout is fairly different and there are more sensors, so I've made this a separate device.
This commit is contained in:
tomfelker
parent
c6e79a33bd
commit
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4 changed files with 147 additions and 1 deletions
1
AUTHORS
1
AUTHORS
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@ -21,3 +21,4 @@ Helge Weissig <helgew@grajagan.org>
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Robert Fraczkiewicz <aromring@gmail.com>
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Nicola Quiriti <nik@wifi4all.it>
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Petr Konecny <pekon@google.com>
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Tom Felker <tomfelker@gmail.com>
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@ -94,7 +94,8 @@
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DECL(tpms_toyota) \
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DECL(tpms_ford) \
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DECL(tpms_renault) \
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DECL(infactory)
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DECL(infactory) \
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DECL(thermopro_tp12)
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typedef struct {
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char name[256];
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@ -103,6 +103,7 @@ add_executable(rtl_433
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devices/tpms_ford.c
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devices/tpms_renault.c
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devices/infactory.c
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devices/thermopro_tp12.c
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)
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143
src/devices/thermopro_tp12.c
Normal file
143
src/devices/thermopro_tp12.c
Normal file
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@ -0,0 +1,143 @@
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/* Thermopro TP-12 Thermometer.
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*
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* Copyright (C) 2017 Google Inc.
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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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#include "data.h"
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#include "rtl_433.h"
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#include "util.h"
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#define MODEL "Thermopro TP12 Thermometer"
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/*
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A normal sequence for the TP12:
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[00] {0} :
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[01] {41} 38 73 21 bb 81 80 : 00111000 01110011 00100001 10111011 10000001 1
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[02] {41} 38 73 21 bb 81 80 : 00111000 01110011 00100001 10111011 10000001 1
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[03] {41} 38 73 21 bb 81 80 : 00111000 01110011 00100001 10111011 10000001 1
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[04] {41} 38 73 21 bb 81 80 : 00111000 01110011 00100001 10111011 10000001 1
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[05] {41} 38 73 21 bb 81 80 : 00111000 01110011 00100001 10111011 10000001 1
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[06] {41} 38 73 21 bb 81 80 : 00111000 01110011 00100001 10111011 10000001 1
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[07] {41} 38 73 21 bb 81 80 : 00111000 01110011 00100001 10111011 10000001 1
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[08] {41} 38 73 21 bb 81 80 : 00111000 01110011 00100001 10111011 10000001 1
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[09] {41} 38 73 21 bb 81 80 : 00111000 01110011 00100001 10111011 10000001 1
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[10] {41} 38 73 21 bb 81 80 : 00111000 01110011 00100001 10111011 10000001 1
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[11] {41} 38 73 21 bb 81 80 : 00111000 01110011 00100001 10111011 10000001 1
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[12] {41} 38 73 21 bb 81 80 : 00111000 01110011 00100001 10111011 10000001 1
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[13] {41} 38 73 21 bb 81 80 : 00111000 01110011 00100001 10111011 10000001 1
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[14] {41} 38 73 21 bb 81 80 : 00111000 01110011 00100001 10111011 10000001 1
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[15] {41} 38 73 21 bb 81 80 : 00111000 01110011 00100001 10111011 10000001 1
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[16] {41} 38 73 21 bb 81 80 : 00111000 01110011 00100001 10111011 10000001 1
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[17] {40} 38 73 21 bb 81 : 00111000 01110011 00100001 10111011 10000001
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Layout appears to be:
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[01] {41} 38 73 21 bb 81 80 : 00111000 01110011 00100001 10111011 10000001 1
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device temp 1 temp temp 2 checksum
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low bits 1 2 low bits
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hi bits
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*/
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#define BITS_IN_VALID_ROW 40
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static int thermopro_tp12_sensor_callback(bitbuffer_t *bitbuffer) {
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int iTemp1, iTemp2, good = -1;
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float fTemp1, fTemp2;
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bitrow_t *bb = bitbuffer->bb;
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unsigned int device, value;
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char time_str[LOCAL_TIME_BUFLEN];
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data_t *data;
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// The device transmits 16 rows, let's check for 3 matching.
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// (Really 17 rows, but the last one doesn't match because it's missing a trailing 1.)
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good = bitbuffer_find_repeated_row(bitbuffer, 3, 40);
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if (good < 0) {
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return 0;
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}
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// Note: the device ID changes randomly each time you replace the battery, so we can't early out based on it.
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// This is probably to allow multiple devices to be used at once. When you replace the receiver batteries
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// or long-press its power button, it pairs with the first device ID it hears.
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device = bb[good][0];
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if(debug_output) {
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// There is a mysterious checksum in bb[good][4]. It may be the same as the checksum used by the TP-11,
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// which consisted of a lookup table containing, for each bit in the message, a byte to be xor-ed into
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// the checksum if the message bit was 1. It should be possible to solve for that table using Gaussian
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// elimnation, so dump some data so we can try this.
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// This format is easily usable by bruteforce-crc, after piping through | grep raw_data | cut -d':' -f2
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// bruteforce-crc didn't find anything, though - this may not be a CRC algorithm specifically.
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fprintf(stderr,"thermopro_tp12_raw_data:");
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for(int bit_index = 0; bit_index < 40; ++bit_index){
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fputc(bitrow_get_bit(bb[good], bit_index) + '0', stderr);
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}
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fputc('\n', stderr);
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}
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iTemp1 = ((bb[good][2] & 0xf0) << 4) | bb[good][1];
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iTemp2 = ((bb[good][2] & 0x0f) << 8) | bb[good][3];
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fTemp1 = (iTemp1 - 200) / 10.;
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fTemp2 = (iTemp2 - 200) / 10.;
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local_time_str(0, time_str);
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data = data_make("time", "", DATA_STRING, time_str,
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"model", "", DATA_STRING, MODEL,
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"id", "Id", DATA_FORMAT, "\t %d", DATA_INT, device,
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"temperature_1_C", "Temperature 1 (Food)", DATA_FORMAT, "%.01f C", DATA_DOUBLE, fTemp1,
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"temperature_2_C", "Temperature 2 (Barbecue)", DATA_FORMAT, "%.01f C", DATA_DOUBLE, fTemp2,
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NULL);
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data_acquired_handler(data);
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return 1;
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}
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static char *output_fields[] = {
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"time",
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"model",
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"id",
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"temperature_1_C",
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"temperature_2_C",
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NULL
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};
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/*
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Analyzing pulses...
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Total count: 714, width: 273019 (1092.1 ms)
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Pulse width distribution:
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[ 0] count: 1, width: 26 [26;26] ( 104 us)
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[ 1] count: 713, width: 119 [116;140] ( 476 us)
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Gap width distribution:
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[ 0] count: 17, width: 895 [841;945] (3580 us)
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[ 1] count: 340, width: 125 [123;128] ( 500 us)
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[ 2] count: 340, width: 369 [366;372] (1476 us)
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[ 3] count: 16, width: 273 [272;274] (1092 us)
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Pulse period distribution:
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[ 0] count: 17, width: 1027 [867;1084] (4108 us)
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[ 1] count: 340, width: 244 [242;262] ( 976 us)
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[ 2] count: 356, width: 483 [390;490] (1932 us)
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Level estimates [high, low]: 15891, 83
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Frequency offsets [F1, F2]: 18586, 0 (+70.9 kHz, +0.0 kHz)
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Those gaps are suspiciously close to 500 us and 1500 us.
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*/
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r_device thermopro_tp12 = {
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.name = MODEL,
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.modulation = OOK_PULSE_PPM_RAW,
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// note that these are in microseconds, not samples.
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.short_limit = 1000,
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.long_limit = 2000,
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.reset_limit = 4000,
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.json_callback = &thermopro_tp12_sensor_callback,
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.disabled = 0,
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.demod_arg = 0,
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.fields = output_fields,
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};
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