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Merge branch 'thermopro_tp12' of https://github.com/tomfelker/rtl_433 into tomfelker-thermopro_tp12

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This commit is contained in:
Christian W. Zuckschwerdt
2017-12-03 22:16:23 +01:00
parent 984f905349 ed542152ae
commit 4a640cf111
7 changed files with 151 additions and 3 deletions
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1
AUTHORS
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@@ -21,3 +21,4 @@ Helge Weissig <helgew@grajagan.org>
Robert Fraczkiewicz <aromring@gmail.com>
Nicola Quiriti <nik@wifi4all.it>
Petr Konecny <pekon@google.com>
Tom Felker <tomfelker@gmail.com>

1
README.md
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@@ -183,6 +183,7 @@ Supported device protocols:
[94] Philips outdoor temperature sensor
[95] Schrader TPMS EG53MA4
[96] NEXA LMST-606
[97] Thermopro TP12 Thermometer
* Disabled by default, use -R n or -G

2
include/rtl_433.h
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@@ -42,7 +42,7 @@
#define MINIMAL_BUF_LENGTH 512
#define MAXIMAL_BUF_LENGTH (256 * 16384)
#define MAX_PROTOCOLS 96
#define MAX_PROTOCOLS 97
#define SIGNAL_GRABBER_BUFFER (12 * DEFAULT_BUF_LENGTH)
/* Supported modulation types */

3
include/rtl_433_devices.h
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@@ -99,7 +99,8 @@
DECL(fordremote) \
DECL(philips) \
DECL(schrader_EG53MA4) \
DECL(nexa)
DECL(nexa) \
DECL(thermopro_tp12)
typedef struct {
char name[256];

1
src/CMakeLists.txt
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@@ -107,6 +107,7 @@ add_executable(rtl_433
devices/fordremote.c
devices/philips.c
devices/nexa.c
devices/thermopro_tp12.c
)
add_library(data data.c)

3
src/Makefile.am
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@@ -92,6 +92,7 @@ rtl_433_SOURCES = baseband.c \
devices/infactory.c \
devices/fordremote.c \
devices/philips.c \
devices/nexa.c
devices/nexa.c \
devices/thermopro_tp12.c
rtl_433_LDADD = $(LIBRTLSDR) $(LIBM)

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