Added support for solight TE44 in weather station app.

weather_station/protocols/protocol_items.c

@@ -12,6 +12,7 @@ const SubGhzProtocol* weather_station_protocol_registry_items[] = {
     &ws_protocol_tx_8300,        &ws_protocol_wendox_w6726,
     &ws_protocol_auriol_ahfl,    &ws_protocol_kedsum_th,
     &ws_protocol_emose601x,      &ws_protocol_acurite_5n1,
+    &ws_protocol_solight_te44,
 };
 
 const SubGhzProtocolRegistry weather_station_protocol_registry = {

weather_station/protocols/protocol_items.h

@@ -23,5 +23,6 @@
 #include "auriol_ahfl.h"
 #include "kedsum_th.h"
 #include "emos_e601x.h"
+#include "solight_te44.h"
 
 extern const SubGhzProtocolRegistry weather_station_protocol_registry;

weather_station/protocols/solight_te44.c

@@ -0,0 +1,337 @@
+#include "solight_te44.h"
+#include <float.h>
+#define TAG "WSProtocolSolightTE44"
+
+/*
+ * Help
+ * https://github.com/merbanan/rtl_433/blob/master/src/devices/solight_te44.c
+ *
+ * Solight TE44 -- Generic wireless thermometer, which might be sold as part of different kits.
+ *
+ * So far these were identified (mostly sold in central/eastern europe)
+ * - Solight TE44
+ * - Solight TE66
+ * - EMOS E0107T
+ * - NX-6876-917 from Pearl (for FWS-70 station).
+ * - newer TFA 30.3197
+ *
+ * Rated -50 C to 70 C, frequency 433,92 MHz, three selectable channels.
+ *
+ * Encoding (see in applications/debug/unit_tests/resources/unit_tests/subghz/solight_te44_raw.sub for example)
+ * - Data begins with     500 -3890
+ * - A zero is encoded    500 -960
+ * - A one is encoded     500 -1940
+ * - Repetition ends with 500 -470  500 -3890
+ *
+ * Data structure:
+ *
+ * - 12 repetitions of the same 36 bit payload, a sync between each repetition
+ * - 36 bit payload format: IIII IIII B0cc TTTT TTTT TTTT 1111 cccc cccc
+ *                                  ^ ^  ^              ^              ^
+ *                                  | |  |              |              |
+ *        8 bit ID (resets) at 28--/  |  |              |              |
+ *        1 bit battery flag  at 27--/  /               |              |
+ *        2 bit channel (0-2) at 24 ---/               /               |
+ *        12 bit signed int temp(C) scale 10 at 12----/               /
+ *        8 bit checksum --------------------------------------------/
+ *
+ * If you're looking at this and thinking: this looks a lot like the Auriol HG06061A data structure. You're not alone,
+ * this is almost identical except for the last checksum, which is not only absent in the Auriol structure, but
+ * the same bits encode the humidity value. So maybe this explains older results of some random weather stations with
+ * implausible humidity values. By adding this before Auriol and expecting the weird data sync we avoid conflicts
+ * with its decoder.
+ *
+ * @m7i-org - because I want less BinRAW in my life
+ *
+ */
+
+static const SubGhzBlockConst ws_protocol_solight_te44_const = {
+    .te_short = 490,
+    .te_long = 3000,
+    .te_delta = 150,
+    .min_count_bit_for_found = 36,
+};
+
+struct WSProtocolDecoderSolightTE44 {
+    SubGhzProtocolDecoderBase base;
+
+    SubGhzBlockDecoder decoder;
+    WSBlockGeneric generic;
+};
+
+struct WSProtocolEncoderSolightTE44 {
+    SubGhzProtocolEncoderBase base;
+
+    SubGhzProtocolBlockEncoder encoder;
+    WSBlockGeneric generic;
+};
+
+const SubGhzProtocolDecoder ws_protocol_solight_te44_decoder = {
+    .alloc = ws_protocol_decoder_solight_te44_alloc,
+    .free = ws_protocol_decoder_solight_te44_free,
+
+    .feed = ws_protocol_decoder_solight_te44_feed,
+    .reset = ws_protocol_decoder_solight_te44_reset,
+
+    .get_hash_data = ws_protocol_decoder_solight_te44_get_hash_data,
+    .serialize = ws_protocol_decoder_solight_te44_serialize,
+    .deserialize = ws_protocol_decoder_solight_te44_deserialize,
+    .get_string = ws_protocol_decoder_solight_te44_get_string,
+};
+
+const SubGhzProtocolEncoder ws_protocol_solight_te44_encoder = {
+    .alloc = NULL,
+    .free = NULL,
+
+    .deserialize = NULL,
+    .stop = NULL,
+    .yield = NULL,
+};
+
+const SubGhzProtocol ws_protocol_solight_te44 = {
+    .name = WS_PROTOCOL_SOLIGHT_TE44_NAME,
+    .type = SubGhzProtocolTypeStatic,
+    .flag = SubGhzProtocolFlag_433 | SubGhzProtocolFlag_315 | SubGhzProtocolFlag_868 |
+            SubGhzProtocolFlag_AM | SubGhzProtocolFlag_Decodable | SubGhzProtocolFlag_Load |
+            SubGhzProtocolFlag_Save,
+    .decoder = &ws_protocol_solight_te44_decoder,
+    .encoder = &ws_protocol_solight_te44_encoder,
+};
+
+typedef enum {
+    SolightTE44DecoderStepReset = 0,
+    SolightTE44DecoderStepSaveDuration,
+    SolightTE44DecoderStepCheckDuration,
+} SolightTE44DecoderStep;
+
+bool float_is_equal(float a, float b) {
+    return fabsf(a - b) <= FLT_EPSILON * fmaxf(fabsf(a), fabsf(b));
+}
+
+void* ws_protocol_decoder_solight_te44_alloc(SubGhzEnvironment* environment) {
+    UNUSED(environment);
+    WSProtocolDecoderSolightTE44* instance = malloc(sizeof(WSProtocolDecoderSolightTE44));
+    instance->base.protocol = &ws_protocol_solight_te44;
+    instance->generic.protocol_name = instance->base.protocol->name;
+    return instance;
+}
+
+void ws_protocol_decoder_solight_te44_free(void* context) {
+    furi_assert(context);
+    WSProtocolDecoderSolightTE44* instance = context;
+    free(instance);
+}
+
+void ws_protocol_decoder_solight_te44_reset(void* context) {
+    furi_assert(context);
+    WSProtocolDecoderSolightTE44* instance = context;
+    instance->decoder.parser_step = SolightTE44DecoderStepReset;
+}
+
+static bool ws_protocol_solight_te44_check(WSProtocolDecoderSolightTE44* instance) {
+    if(!instance->decoder.decode_data) return false;
+    if(((instance->decoder.decode_data >> 8) & 0x0f) != 0x0f) return false; // const not 1111
+
+    // Rubicson CRC check
+    uint8_t msg_rubicson_crc[] = {
+        instance->decoder.decode_data >> 28,
+        instance->decoder.decode_data >> 20,
+        instance->decoder.decode_data >> 12,
+        0xf0,
+        (instance->decoder.decode_data & 0xf0) | (instance->decoder.decode_data & 0x0f)};
+
+    uint8_t rubicson_crc = subghz_protocol_blocks_crc8(msg_rubicson_crc, 5, 0x31, 0x6c);
+
+    return rubicson_crc == 0;
+}
+
+/**
+ * Analysis of received data
+ * @param instance Pointer to a WSBlockGeneric* instance
+ */
+static void ws_protocol_solight_te44_extract_data(WSBlockGeneric* instance) {
+    instance->id = (instance->data >> 28) & 0xff;
+    instance->battery_low = !((instance->data >> 27) & 0x01);
+    instance->channel = ((instance->data >> 24) & 0x03) + 1;
+
+    int16_t temp = (instance->data >> 12) & 0x0fff;
+    /* Handle signed data */
+    if(temp & 0x0800) {
+        temp |= 0xf000;
+    }
+    instance->temp = (float)(temp / 10.0f);
+
+    instance->btn = WS_NO_BTN;
+    instance->humidity = WS_NO_HUMIDITY;
+}
+
+void ws_protocol_decoder_solight_te44_feed(void* context, bool level, uint32_t duration) {
+    furi_assert(context);
+    WSProtocolDecoderSolightTE44* instance = context;
+
+    switch(instance->decoder.parser_step) {
+    case SolightTE44DecoderStepReset:
+        if((!level) && duration >= ws_protocol_solight_te44_const.te_long) {
+            instance->decoder.parser_step = SolightTE44DecoderStepSaveDuration;
+            instance->decoder.decode_data = 0;
+            instance->decoder.decode_count_bit = 0;
+        }
+        break;
+
+    case SolightTE44DecoderStepSaveDuration:
+        if(level) {
+            instance->decoder.te_last = duration;
+            instance->decoder.parser_step = SolightTE44DecoderStepCheckDuration;
+        } else {
+            instance->decoder.parser_step = SolightTE44DecoderStepReset;
+        }
+        break;
+
+    case SolightTE44DecoderStepCheckDuration:
+        if(!level) {
+            if(DURATION_DIFF(duration, ws_protocol_solight_te44_const.te_short) <
+               ws_protocol_solight_te44_const.te_delta) {
+                if(instance->decoder.decode_count_bit ==
+                       ws_protocol_solight_te44_const.min_count_bit_for_found &&
+                   ws_protocol_solight_te44_check(instance)) {
+                    instance->generic.data = instance->decoder.decode_data;
+                    instance->generic.data_count_bit = instance->decoder.decode_count_bit;
+                    ws_protocol_solight_te44_extract_data(&instance->generic);
+
+                    if(instance->base.callback) {
+                        instance->base.callback(&instance->base, instance->base.context);
+                    }
+                }
+                instance->decoder.decode_data = 0;
+                instance->decoder.decode_count_bit = 0;
+                instance->decoder.parser_step = SolightTE44DecoderStepReset;
+            } else if(
+                DURATION_DIFF(instance->decoder.te_last, ws_protocol_solight_te44_const.te_short) <
+                ws_protocol_solight_te44_const.te_delta) {
+                if(DURATION_DIFF(duration, ws_protocol_solight_te44_const.te_short * 2) <
+                   ws_protocol_solight_te44_const.te_delta) {
+                    subghz_protocol_blocks_add_bit(&instance->decoder, 0);
+                    instance->decoder.parser_step = SolightTE44DecoderStepSaveDuration;
+                } else if(
+                    DURATION_DIFF(duration, ws_protocol_solight_te44_const.te_short * 4) <
+                    ws_protocol_solight_te44_const.te_delta) {
+                    subghz_protocol_blocks_add_bit(&instance->decoder, 1);
+                    instance->decoder.parser_step = SolightTE44DecoderStepSaveDuration;
+                } else
+                    instance->decoder.parser_step = SolightTE44DecoderStepReset;
+            } else
+                instance->decoder.parser_step = SolightTE44DecoderStepReset;
+        } else
+            instance->decoder.parser_step = SolightTE44DecoderStepReset;
+        break;
+    }
+}
+
+uint8_t ws_protocol_decoder_solight_te44_get_hash_data(void* context) {
+    furi_assert(context);
+    WSProtocolDecoderSolightTE44* instance = context;
+    return subghz_protocol_blocks_get_hash_data(
+        &instance->decoder, (instance->decoder.decode_count_bit / 8) + 1);
+}
+
+SubGhzProtocolStatus ws_protocol_decoder_solight_te44_serialize(
+    void* context,
+    FlipperFormat* flipper_format,
+    SubGhzRadioPreset* preset) {
+    furi_assert(context);
+    WSProtocolDecoderSolightTE44* instance = context;
+    return ws_block_generic_serialize(&instance->generic, flipper_format, preset);
+}
+
+SubGhzProtocolStatus
+    ws_protocol_decoder_solight_te44_deserialize(void* context, FlipperFormat* flipper_format) {
+    furi_assert(context);
+    WSProtocolDecoderSolightTE44* instance = context;
+    return ws_block_generic_deserialize_check_count_bit(
+        &instance->generic,
+        flipper_format,
+        ws_protocol_solight_te44_const.min_count_bit_for_found);
+}
+
+void generic_get_string(WSBlockGeneric* instance, FuriString* output) {
+    furi_string_cat_printf(
+        output, "%s\r\n%dbit", instance->protocol_name, instance->data_count_bit);
+    if(instance->channel != WS_NO_CHANNEL) {
+        furi_string_cat_printf(output, "   Ch: %01d", instance->channel);
+    }
+    if(instance->btn != WS_NO_BTN) {
+        furi_string_cat_printf(output, "   Btn: %01d\r\n", instance->btn);
+    } else {
+        furi_string_cat(output, "\r\n");
+    }
+
+    if(instance->id != WS_NO_ID) {
+        furi_string_cat_printf(output, "Sn: 0x%02lX   ", instance->id);
+    }
+    if(instance->battery_low != WS_NO_BATT) {
+        furi_string_cat_printf(output, "Batt: %s\r\n", (!instance->battery_low ? "ok" : "low"));
+    } else {
+        furi_string_cat(output, "\r\n");
+    }
+
+    furi_string_cat_printf(
+        output,
+        "Data: 0x%lX%08lX\r\n",
+        (uint32_t)(instance->data >> 32),
+        (uint32_t)(instance->data));
+
+    if(!float_is_equal(instance->temp, WS_NO_TEMPERATURE)) {
+        bool is_metric = furi_hal_rtc_get_locale_units() == FuriHalRtcLocaleUnitsMetric;
+        furi_string_cat_printf(
+            output,
+            "Temp: %3.1f%c   ",
+            (double)(is_metric ? instance->temp : locale_celsius_to_fahrenheit(instance->temp)),
+            is_metric ? 'C' : 'F');
+    }
+    if(instance->humidity != WS_NO_HUMIDITY) {
+        furi_string_cat_printf(output, "Hum: %d%%", instance->humidity);
+    }
+}
+
+void ws_protocol_decoder_solight_te44_get_string(void* context, FuriString* output) {
+    furi_assert(context);
+    WSBlockGeneric* instance = &((WSProtocolDecoderSolightTE44*)context)->generic;
+
+    furi_string_cat_printf(
+        output, "%s\r\n%dbit", instance->protocol_name, instance->data_count_bit);
+    if(instance->channel != WS_NO_CHANNEL) {
+        furi_string_cat_printf(output, "   Ch: %01d", instance->channel);
+    }
+    if(instance->btn != WS_NO_BTN) {
+        furi_string_cat_printf(output, "   Btn: %01d\r\n", instance->btn);
+    } else {
+        furi_string_cat(output, "\r\n");
+    }
+
+    if(instance->id != WS_NO_ID) {
+        furi_string_cat_printf(output, "Sn: 0x%02lX   ", instance->id);
+    }
+    if(instance->battery_low != WS_NO_BATT) {
+        furi_string_cat_printf(output, "Batt: %s\r\n", (!instance->battery_low ? "ok" : "low"));
+    } else {
+        furi_string_cat(output, "\r\n");
+    }
+
+    furi_string_cat_printf(
+        output,
+        "Data: 0x%lX%08lX\r\n",
+        (uint32_t)(instance->data >> 32),
+        (uint32_t)(instance->data));
+
+    if(!float_is_equal(instance->temp, WS_NO_TEMPERATURE)) {
+        bool is_metric = furi_hal_rtc_get_locale_units() == FuriHalRtcLocaleUnitsMetric;
+        furi_string_cat_printf(
+            output,
+            "Temp: %3.1f%c   ",
+            (double)(is_metric ? instance->temp : locale_celsius_to_fahrenheit(instance->temp)),
+            is_metric ? 'C' : 'F');
+    }
+    if(instance->humidity != WS_NO_HUMIDITY) {
+        furi_string_cat_printf(output, "Hum: %d%%", instance->humidity);
+    }
+}