Add support for Altronics X7064 sensor (closes #2000)

merbanan · Mar 3, 2022 · 63514de · 63514de
1 parent dd1c970
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diff --git a/README.md b/README.md
@@ -297,6 +297,7 @@ See [CONTRIBUTING.md](./docs/CONTRIBUTING.md).
     [212]  Renault 0435R TPMS
     [213]  Fine Offset Electronics WS80 weather station
     [214]  EMOS E6016 weatherstation with DCF77
+    [215]  Altronics X7064 temperature and humidity sensor
 
 * Disabled by default, use -R n or -G
 

diff --git a/conf/rtl_433.example.conf b/conf/rtl_433.example.conf
@@ -436,6 +436,7 @@ stop_after_successful_events false
   protocol 212 # Renault 0435R TPMS
   protocol 213 # Fine Offset Electronics WS80 weather station
   protocol 214 # EMOS E6016 weatherstation with DCF77
+  protocol 215 # Altronics X7064 temperature and humidity sensor
 
 ## Flex devices (command line option "-X")
 

diff --git a/include/rtl_433_devices.h b/include/rtl_433_devices.h
@@ -222,6 +222,7 @@
     DECL(tpms_renault_0435r) \
     DECL(fineoffset_ws80) \
     DECL(emos_e6016) \
+    DECL(altronics_7064) \
 
     /* Add new decoders here. */
 

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
@@ -46,6 +46,7 @@ add_library(r_433 STATIC
     devices/acurite_01185m.c
     devices/akhan_100F14.c
     devices/alecto.c
+    devices/altronics_x7064.c
     devices/ambient_weather.c
     devices/ambientweather_tx8300.c
     devices/ambientweather_wh31e.c

diff --git a/src/devices/altronics_x7064.c b/src/devices/altronics_x7064.c
@@ -0,0 +1,131 @@
+/** @file
+    Altronics X7064 temperature and humidity sensor.
+
+    Copyright (C) 2022 Christian W. Zuckschwerdt <zany@triq.net>
+    based on protocol decoding by Thomas White
+
+    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"
+
+/**
+Altronics X7064 temperature and humidity sensor.
+
+S.a. issue #2000
+
+- Likely a rebranded device, sold by Altronics
+- Data length is 32 bytes with a preamble of 10 bytes
+
+Data Layout:
+
+    // That fits nicely: aaa16e95 a3 8a ae 2d is channel 1, id 6e95, temp 38e (=910, 1 F, -17.2 C), hum 2d (=45).
+
+    AA AC II IB AT TA AT HH AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA SS
+
+- C: (4 bit) channel
+- I: (12 bit) ID, maybe longer
+- B: (4 bit) battery indication, might be ID still
+- T: (12 bit) temperature in F, offset 900, scale 10
+- H: (8 bit) humidity
+- A: (4 bit) fixed values of 0xA
+- S: (8 bit) checksum
+
+Raw data:
+
+    FF FF AA AA AA AA AA CA CA 54
+    AA A1 6E 95 A6 BA A5 3B AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA D4
+    AA 00 0
+
+Format string:
+
+    12h CH:4h ID:12h BAT:4h TEMP:4x4h4h4x4x4h HUM:8d 184h CHKSUM:8h 8x
+
+Decoded example:
+
+    aaa CH:1 ID:6e9 BAT:5 TEMP:6b5 HUM:059 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa CHKSUM:d4 000
+
+*/
+
+static int altronics_7064_decode(r_device *decoder, bitbuffer_t *bitbuffer)
+{
+    // full preamble is ffffaaaaaaaaaacaca54
+    uint8_t const preamble_pattern[] = {0xaa, 0xaa, 0xca, 0xca, 0x54};
+
+    int ret = 0;
+    for (unsigned row = 0; row < bitbuffer->num_rows; ++row) {
+        unsigned pos = bitbuffer_search(bitbuffer, row, 0, preamble_pattern, sizeof(preamble_pattern) * 8);
+
+        if (pos >= bitbuffer->bits_per_row[row]) {
+            decoder_log(decoder, 2, __func__, "Preamble not found");
+            ret = DECODE_ABORT_EARLY;
+            continue;
+        }
+        decoder_logf(decoder, 2, __func__, "Found row: %d", row);
+
+        pos += sizeof(preamble_pattern) * 8;
+        // we expect 32 bytes
+        if (pos + 32 * 8 > bitbuffer->bits_per_row[row]) {
+            decoder_log(decoder, 2, __func__, "Length check fail");
+            ret = DECODE_ABORT_LENGTH;
+            continue;
+        }
+        uint8_t b[32] = {0};
+        bitbuffer_extract_bytes(bitbuffer, row, pos, b, sizeof(b) * 8);
+
+        // verify checksum
+        if ((add_bytes(b, 31) & 0xff) != b[31]) {
+            decoder_log(decoder, 2, __func__, "Checksum fail");
+            ret = DECODE_FAIL_MIC;
+            continue;
+        }
+
+        int channel     = (b[1] & 0xf);
+        int id          = (b[2] << 4) | (b[3] >> 4);
+        int battery_low = (b[3] & 0x04);
+        int temp_raw    = ((b[4] & 0x0f) << 8) | (b[5] & 0xf0) | (b[6] & 0x0f); // weird format
+        float temp_f    = (temp_raw - 900) * 0.1f;
+        int humidity    = b[7];
+
+        /* clang-format off */
+        data_t *data = data_make(
+                "model",            "",                 DATA_STRING, "Altronics-X7064",
+                "id",               "",                 DATA_FORMAT, "%03x", DATA_INT,    id,
+                "channel",          "Channel",          DATA_INT,    channel,
+                "battery_ok",       "Battery_OK",       DATA_INT,    !battery_low,
+                "temperature_F",    "Temperature_F",    DATA_FORMAT, "%.1f", DATA_DOUBLE, temp_f,
+                "humidity",         "Humidity",         DATA_FORMAT, "%u", DATA_INT, humidity,
+                "mic",              "Integrity",        DATA_STRING, "CHECKSUM",
+                NULL);
+        /* clang-format on */
+
+        decoder_output_data(decoder, data);
+        return 1;
+    }
+    return ret;
+}
+
+static char *output_fields[] = {
+        "model",
+        "id",
+        "channel",
+        "battery_ok",
+        "temperature_F",
+        "humidity",
+        "mic",
+        NULL,
+};
+
+r_device altronics_7064 = {
+        .name        = "Altronics X7064 temperature and humidity sensor",
+        .modulation  = FSK_PULSE_PCM,
+        .short_width = 90,
+        .long_width  = 90,
+        .gap_limit   = 900,
+        .reset_limit = 9000,
+        .decode_fn   = &altronics_7064_decode,
+        .fields      = output_fields,
+};
diff --git a/vs15/rtl_433.vcxproj b/vs15/rtl_433.vcxproj
@@ -181,6 +181,7 @@ COPY ..\..\libusb\MS64\dll\libusb*.dll $(TargetDir)</Command>
     <ClCompile Include="..\src\devices\acurite_01185m.c" />
     <ClCompile Include="..\src\devices\akhan_100F14.c" />
     <ClCompile Include="..\src\devices\alecto.c" />
+    <ClCompile Include="..\src\devices\altronics_x7064.c" />
     <ClCompile Include="..\src\devices\ambient_weather.c" />
     <ClCompile Include="..\src\devices\ambientweather_tx8300.c" />
     <ClCompile Include="..\src\devices\ambientweather_wh31e.c" />

diff --git a/vs15/rtl_433.vcxproj.filters b/vs15/rtl_433.vcxproj.filters
@@ -280,6 +280,9 @@
     <ClCompile Include="..\src\devices\alecto.c">
       <Filter>Source Files\devices</Filter>
     </ClCompile>
+    <ClCompile Include="..\src\devices\altronics_x7064.c">
+      <Filter>Source Files\devices</Filter>
+    </ClCompile>
     <ClCompile Include="..\src\devices\ambient_weather.c">
       <Filter>Source Files\devices</Filter>
     </ClCompile>