Add Vevor Weather Station 7-in-1

README.md

@@ -347,6 +347,8 @@ See [CONTRIBUTING.md](./docs/CONTRIBUTING.md).
     [259]  ThermoPro TP829b Meat Thermometer 4 coated probes
     [260]* Arad/Master Meter Dialog3G water utility meter
     [261]  Geevon TX16-3 outdoor sensor
+    [262]  Fine Offset Electronics WH46 air quality sensor
+    [263]  Vevor Wireless Weather Station 7-in-1
 
 * Disabled by default, use -R n or a conf file to enable
 

include/rtl_433_devices.h

@@ -270,6 +270,7 @@
     DECL(arad_ms_meter) \
     DECL(geevon) \
     DECL(fineoffset_wh46) \
+    DECL(vevor_7in1) \
 
     /* Add new decoders here. */
 

src/CMakeLists.txt

@@ -262,6 +262,7 @@ add_library(r_433 STATIC
     devices/ttx201.c
     devices/vaillant_vrt340f.c
     devices/vauno_en8822c.c
+    devices/vevor_7in1.c
     devices/visonic_powercode.c
     devices/watts_thermostat.c
     devices/waveman.c

src/devices/vevor_7in1.c

@@ -0,0 +1,165 @@
+/** @file
+    Vevor Wireless Weather Station 7-in-1.
+
+    Copyright (C) 2024 Bruno OCTAU (ProfBoc75)
+
+    Based on Emax protocol
+
+    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"
+
+/**
+Vevor Wireless Weather Station 7-in-1.
+
+S.a. issue #3020
+
+Data Layout:
+
+- Preamble/Syncword  .... AA AA AA CA CA 54
+
+    Byte Position   0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
+    Sample         AA 00 f8 f7 9d 02 e3 32 01 0e 03 02 0b 01 38 02 39 7a 86 e0 87 21 85 6a d0 08 da fa ab 2f 64 4a e3 00 00
+                   AA KC II II BF TT TT HH 0G GG WW WD DD RR RR UU LL LL xx SS yy ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ??
+
+- K:  {4} Type of sensor, = 0x0
+- C:  {4} Channel, = 0x0
+- I: {16} Sensor ID
+- BF: {8} Battery Flag 0x9d = battery low, 0x1d = normal battery, may be pairing button to be confirmed ?
+- T: {12} temperature in C, offset 500, scale 10
+- H:  {8} humidity %
+- G: {12} Wind Gust (16/12 bit?)
+- W: {12} Wind speed
+- D: {12} Wind Direction offset 257
+- R: {16} Rain , 0.2 mm to be defined/confirmed ?
+- U:  {5} UV index from 0 to 16
+- L: {1 + 15 bit} Lux value, if first bit = 1 , then x 10 the 15 bit.
+- ?: unknown, fixed values
+- A:  {4} fixed values of 0xA
+- 0:  {4} fixed values of 0x0
+- xx: {8} incremental value each tx
+- S:  {8} checksum
+- yy: {8} incremental value each tx yy = xx + 1
+
+*/
+
+#define VEVOR_MESSAGE_BITLEN     264
+
+static int vevor_7in1_decode(r_device *decoder, bitbuffer_t *bitbuffer)
+{
+    // preamble is ....aaaaaaaaaacaca54
+    uint8_t const preamble_pattern[] = {0xaa, 0xaa, 0xca, 0xca, 0x54};
+
+    // Because of a gap false positive if LUX at max for weather station, only single row to be analyzed with expected 2 repeats inside the data.
+    if (bitbuffer->num_rows != 1) {
+        return DECODE_ABORT_EARLY;
+    }
+
+    int ret = 0;
+    int pos = 0;
+    while ((pos = bitbuffer_search(bitbuffer, 0, pos, preamble_pattern, sizeof(preamble_pattern) * 8)) + VEVOR_MESSAGE_BITLEN <= bitbuffer->bits_per_row[0]) {
+
+        if (pos >= bitbuffer->bits_per_row[0]) {
+            decoder_log(decoder, 2, __func__, "Preamble not found");
+            ret = DECODE_ABORT_EARLY;
+            continue;
+        }
+        decoder_logf(decoder, 2, __func__, "Found Vevor preamble pos: %d", pos);
+
+        pos += sizeof(preamble_pattern) * 8;
+        // we expect at least 21 bytes
+        if (pos + 21 * 8 > bitbuffer->bits_per_row[0]) {
+            decoder_log(decoder, 2, __func__, "Length check fail");
+            ret = DECODE_ABORT_LENGTH;
+            continue;
+        }
+        uint8_t b[21] = {0};
+        bitbuffer_extract_bytes(bitbuffer, 0, pos, b, sizeof(b) * 8);
+
+        // verify checksum
+        if ((add_bytes(b, 19) & 0xff) != b[19]) {
+            decoder_log(decoder, 2, __func__, "Checksum fail");
+            ret = DECODE_FAIL_MIC;
+            continue;
+        }
+
+        int kind        = ((b[1] & 0xf0) >> 4);
+        int channel     = (b[1] & 0x0f);
+        int id          = (b[2] << 8) | b[3];
+        int battery_low = (b[4] & 0x80) >> 7;
+
+        if (b[0] == 0xAA && b[1] == 0) {
+
+            int temp_raw      = (b[5] << 8) | b[6];
+            float temp_c      = (temp_raw - 500) * 0.1f;
+            int humidity      = b[7];
+            int gust_raw      = (b[8] & 0x0f) << 8 | b[9];
+            float gust_kmh    = gust_raw * 0.2f;
+            int wind_raw      = (b[10] << 4) | ((b[11] & 0xf0) >> 4);
+            float speed_kmh   = wind_raw * 0.2f;
+            int direction_deg = (((b[11] & 0x0f) << 8) | b[12]) - 257;
+            int rain_raw      = (b[13] << 8) | b[14];
+            float rain_mm     = rain_raw * 0.2f;
+            int uv_index      = (b[15] & 0x1f) - 1;
+            int lux_multi     = (b[16] & 0x80) >> 7;
+            int light_lux     = ((b[16] & 0x7F) << 8) | b[17];
+            if (lux_multi == 1) {
+                light_lux = light_lux * 10;
+            }
+
+            /* clang-format off */
+            data_t *data = data_make(
+                    "model",            "",                 DATA_STRING, "Vevor-7in1",
+                    "id",               "",                 DATA_FORMAT, "%04x", DATA_INT,    id,
+                    "channel",          "Channel",          DATA_INT,    channel,
+                    "battery_ok",       "Battery_OK",       DATA_INT,    !battery_low,
+                    "temperature_C",    "Temperature",      DATA_FORMAT, "%.1f C", DATA_DOUBLE, temp_c,
+                    "humidity",         "Humidity",         DATA_FORMAT, "%u %%", DATA_INT, humidity,
+                    "wind_avg_km_h",    "Wind avg speed",   DATA_FORMAT, "%.1f km/h",  DATA_DOUBLE, speed_kmh,
+                    "wind_max_km_h",    "Wind max speed",   DATA_FORMAT, "%.1f km/h",  DATA_DOUBLE, gust_kmh,
+                    "wind_dir_deg",     "Wind Direction",   DATA_INT,    direction_deg,
+                    "rain_mm",          "Total rainfall",   DATA_FORMAT, "%.1f mm",  DATA_DOUBLE, rain_mm,
+                    "uv",               "UV Index",         DATA_FORMAT, "%u", DATA_INT, uv_index,
+                    "light_lux",        "Lux",              DATA_FORMAT, "%u", DATA_INT, light_lux,
+                    "mic",              "Integrity",        DATA_STRING, "CHECKSUM",
+                    NULL);
+            /* clang-format on */
+
+            decoder_output_data(decoder, data);
+            return 1;
+        }
+        pos += VEVOR_MESSAGE_BITLEN;
+    }
+    return ret;
+}
+
+static char const *const output_fields[] = {
+        "model",
+        "id",
+        "channel",
+        "battery_ok",
+        "temperature_C",
+        "humidity",
+        "wind_avg_km_h",
+        "wind_max_km_h",
+        "rain_mm",
+        "wind_dir_deg",
+        "uv",
+        "light_lux",
+        "mic",
+        NULL,
+};
+
+r_device const vevor_7in1 = {
+        .name        = "Vevor Wireless Weather Station 7-in-1",
+        .modulation  = FSK_PULSE_PCM,
+        .short_width = 90,
+        .long_width  = 90,
+        .reset_limit = 9000, // keep message is one row because of a possible gap in the message if LUX values are zeros
+        .decode_fn   = &vevor_7in1_decode,
+        .fields      = output_fields,
+};