flipperzero-firmware/applications/plugins/weather_station/protocols/acurite_592txr.c

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#include "acurite_592txr.h"
#define TAG "WSProtocolAcurite_592TXR"
/*
* Help
* https://github.com/merbanan/rtl_433/blob/master/src/devices/acurite.c
*
* Acurite 592TXR Temperature Humidity sensor decoder
* Message Type 0x04, 7 bytes
* | Byte 0 | Byte 1 | Byte 2 | Byte 3 | Byte 4 | Byte 5 | Byte 6 |
* | --------- | --------- | --------- | --------- | --------- | --------- | --------- |
* | CCII IIII | IIII IIII | pB00 0100 | pHHH HHHH | p??T TTTT | pTTT TTTT | KKKK KKKK |
* - C: Channel 00: C, 10: B, 11: A, (01 is invalid)
* - I: Device ID (14 bits)
* - B: Battery, 1 is battery OK, 0 is battery low
* - M: Message type (6 bits), 0x04
* - T: Temperature Celsius (11 - 14 bits?), + 1000 * 10
* - H: Relative Humidity (%) (7 bits)
* - K: Checksum (8 bits)
* - p: Parity bit
* Notes:
* - Temperature
* - Encoded as Celsius + 1000 * 10
* - only 11 bits needed for specified range -40 C to 70 C (-40 F - 158 F)
* - However 14 bits available for temperature, giving possible range of -100 C to 1538.4 C
* - @todo - check if high 3 bits ever used for anything else
*
*/
static const SubGhzBlockConst ws_protocol_acurite_592txr_const = {
.te_short = 200,
.te_long = 400,
.te_delta = 90,
.min_count_bit_for_found = 56,
};
struct WSProtocolDecoderAcurite_592TXR {
SubGhzProtocolDecoderBase base;
SubGhzBlockDecoder decoder;
WSBlockGeneric generic;
uint16_t header_count;
};
struct WSProtocolEncoderAcurite_592TXR {
SubGhzProtocolEncoderBase base;
SubGhzProtocolBlockEncoder encoder;
WSBlockGeneric generic;
};
typedef enum {
Acurite_592TXRDecoderStepReset = 0,
Acurite_592TXRDecoderStepCheckPreambule,
Acurite_592TXRDecoderStepSaveDuration,
Acurite_592TXRDecoderStepCheckDuration,
} Acurite_592TXRDecoderStep;
const SubGhzProtocolDecoder ws_protocol_acurite_592txr_decoder = {
.alloc = ws_protocol_decoder_acurite_592txr_alloc,
.free = ws_protocol_decoder_acurite_592txr_free,
.feed = ws_protocol_decoder_acurite_592txr_feed,
.reset = ws_protocol_decoder_acurite_592txr_reset,
.get_hash_data = ws_protocol_decoder_acurite_592txr_get_hash_data,
.serialize = ws_protocol_decoder_acurite_592txr_serialize,
.deserialize = ws_protocol_decoder_acurite_592txr_deserialize,
.get_string = ws_protocol_decoder_acurite_592txr_get_string,
};
const SubGhzProtocolEncoder ws_protocol_acurite_592txr_encoder = {
.alloc = NULL,
.free = NULL,
.deserialize = NULL,
.stop = NULL,
.yield = NULL,
};
const SubGhzProtocol ws_protocol_acurite_592txr = {
.name = WS_PROTOCOL_ACURITE_592TXR_NAME,
.type = SubGhzProtocolWeatherStation,
.flag = SubGhzProtocolFlag_433 | SubGhzProtocolFlag_315 | SubGhzProtocolFlag_868 |
SubGhzProtocolFlag_AM | SubGhzProtocolFlag_Decodable,
.decoder = &ws_protocol_acurite_592txr_decoder,
.encoder = &ws_protocol_acurite_592txr_encoder,
};
void* ws_protocol_decoder_acurite_592txr_alloc(SubGhzEnvironment* environment) {
UNUSED(environment);
WSProtocolDecoderAcurite_592TXR* instance = malloc(sizeof(WSProtocolDecoderAcurite_592TXR));
instance->base.protocol = &ws_protocol_acurite_592txr;
instance->generic.protocol_name = instance->base.protocol->name;
return instance;
}
void ws_protocol_decoder_acurite_592txr_free(void* context) {
furi_assert(context);
WSProtocolDecoderAcurite_592TXR* instance = context;
free(instance);
}
void ws_protocol_decoder_acurite_592txr_reset(void* context) {
furi_assert(context);
WSProtocolDecoderAcurite_592TXR* instance = context;
instance->decoder.parser_step = Acurite_592TXRDecoderStepReset;
}
static bool ws_protocol_acurite_592txr_check_crc(WSProtocolDecoderAcurite_592TXR* instance) {
uint8_t msg[] = {
instance->decoder.decode_data >> 48,
instance->decoder.decode_data >> 40,
instance->decoder.decode_data >> 32,
instance->decoder.decode_data >> 24,
instance->decoder.decode_data >> 16,
instance->decoder.decode_data >> 8};
if((subghz_protocol_blocks_add_bytes(msg, 6) ==
(uint8_t)(instance->decoder.decode_data & 0xFF)) &&
(!subghz_protocol_blocks_parity_bytes(&msg[2], 4))) {
return true;
} else {
return false;
}
}
/**
* Analysis of received data
* @param instance Pointer to a WSBlockGeneric* instance
*/
static void ws_protocol_acurite_592txr_remote_controller(WSBlockGeneric* instance) {
uint8_t channel[] = {3, 0, 2, 1};
uint8_t channel_raw = ((instance->data >> 54) & 0x03);
instance->channel = channel[channel_raw];
instance->id = (instance->data >> 40) & 0x3FFF;
instance->battery_low = !((instance->data >> 38) & 1);
instance->humidity = (instance->data >> 24) & 0x7F;
uint16_t temp_raw = ((instance->data >> 9) & 0xF80) | ((instance->data >> 8) & 0x7F);
instance->temp = ((float)(temp_raw)-1000) / 10.0f;
instance->btn = WS_NO_BTN;
}
void ws_protocol_decoder_acurite_592txr_feed(void* context, bool level, uint32_t duration) {
furi_assert(context);
WSProtocolDecoderAcurite_592TXR* instance = context;
switch(instance->decoder.parser_step) {
case Acurite_592TXRDecoderStepReset:
if((level) && (DURATION_DIFF(duration, ws_protocol_acurite_592txr_const.te_short * 3) <
ws_protocol_acurite_592txr_const.te_delta * 2)) {
instance->decoder.parser_step = Acurite_592TXRDecoderStepCheckPreambule;
instance->decoder.te_last = duration;
instance->header_count = 0;
}
break;
case Acurite_592TXRDecoderStepCheckPreambule:
if(level) {
instance->decoder.te_last = duration;
} else {
if((DURATION_DIFF(
instance->decoder.te_last, ws_protocol_acurite_592txr_const.te_short * 3) <
ws_protocol_acurite_592txr_const.te_delta * 2) &&
(DURATION_DIFF(duration, ws_protocol_acurite_592txr_const.te_short * 3) <
ws_protocol_acurite_592txr_const.te_delta * 2)) {
//Found preambule
instance->header_count++;
} else if((instance->header_count > 2) && (instance->header_count < 5)) {
if((DURATION_DIFF(
instance->decoder.te_last, ws_protocol_acurite_592txr_const.te_short) <
ws_protocol_acurite_592txr_const.te_delta) &&
(DURATION_DIFF(duration, ws_protocol_acurite_592txr_const.te_long) <
ws_protocol_acurite_592txr_const.te_delta)) {
instance->decoder.decode_data = 0;
instance->decoder.decode_count_bit = 0;
subghz_protocol_blocks_add_bit(&instance->decoder, 0);
instance->decoder.parser_step = Acurite_592TXRDecoderStepSaveDuration;
} else if(
(DURATION_DIFF(
instance->decoder.te_last, ws_protocol_acurite_592txr_const.te_long) <
ws_protocol_acurite_592txr_const.te_delta) &&
(DURATION_DIFF(duration, ws_protocol_acurite_592txr_const.te_short) <
ws_protocol_acurite_592txr_const.te_delta)) {
instance->decoder.decode_data = 0;
instance->decoder.decode_count_bit = 0;
subghz_protocol_blocks_add_bit(&instance->decoder, 1);
instance->decoder.parser_step = Acurite_592TXRDecoderStepSaveDuration;
} else {
instance->decoder.parser_step = Acurite_592TXRDecoderStepReset;
}
} else {
instance->decoder.parser_step = Acurite_592TXRDecoderStepReset;
}
}
break;
case Acurite_592TXRDecoderStepSaveDuration:
if(level) {
instance->decoder.te_last = duration;
instance->decoder.parser_step = Acurite_592TXRDecoderStepCheckDuration;
} else {
instance->decoder.parser_step = Acurite_592TXRDecoderStepReset;
}
break;
case Acurite_592TXRDecoderStepCheckDuration:
if(!level) {
if(duration >= ((uint32_t)ws_protocol_acurite_592txr_const.te_short * 5)) {
if((instance->decoder.decode_count_bit ==
ws_protocol_acurite_592txr_const.min_count_bit_for_found) &&
ws_protocol_acurite_592txr_check_crc(instance)) {
instance->generic.data = instance->decoder.decode_data;
instance->generic.data_count_bit = instance->decoder.decode_count_bit;
ws_protocol_acurite_592txr_remote_controller(&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 = Acurite_592TXRDecoderStepReset;
break;
} else if(
(DURATION_DIFF(
instance->decoder.te_last, ws_protocol_acurite_592txr_const.te_short) <
ws_protocol_acurite_592txr_const.te_delta) &&
(DURATION_DIFF(duration, ws_protocol_acurite_592txr_const.te_long) <
ws_protocol_acurite_592txr_const.te_delta)) {
subghz_protocol_blocks_add_bit(&instance->decoder, 0);
instance->decoder.parser_step = Acurite_592TXRDecoderStepSaveDuration;
} else if(
(DURATION_DIFF(
instance->decoder.te_last, ws_protocol_acurite_592txr_const.te_long) <
ws_protocol_acurite_592txr_const.te_delta) &&
(DURATION_DIFF(duration, ws_protocol_acurite_592txr_const.te_short) <
ws_protocol_acurite_592txr_const.te_delta)) {
subghz_protocol_blocks_add_bit(&instance->decoder, 1);
instance->decoder.parser_step = Acurite_592TXRDecoderStepSaveDuration;
} else {
instance->decoder.parser_step = Acurite_592TXRDecoderStepReset;
}
} else {
instance->decoder.parser_step = Acurite_592TXRDecoderStepReset;
}
break;
}
}
uint8_t ws_protocol_decoder_acurite_592txr_get_hash_data(void* context) {
furi_assert(context);
WSProtocolDecoderAcurite_592TXR* instance = context;
return subghz_protocol_blocks_get_hash_data(
&instance->decoder, (instance->decoder.decode_count_bit / 8) + 1);
}
bool ws_protocol_decoder_acurite_592txr_serialize(
void* context,
FlipperFormat* flipper_format,
SubGhzRadioPreset* preset) {
furi_assert(context);
WSProtocolDecoderAcurite_592TXR* instance = context;
return ws_block_generic_serialize(&instance->generic, flipper_format, preset);
}
bool ws_protocol_decoder_acurite_592txr_deserialize(void* context, FlipperFormat* flipper_format) {
furi_assert(context);
WSProtocolDecoderAcurite_592TXR* instance = context;
bool ret = false;
do {
if(!ws_block_generic_deserialize(&instance->generic, flipper_format)) {
break;
}
if(instance->generic.data_count_bit !=
ws_protocol_acurite_592txr_const.min_count_bit_for_found) {
FURI_LOG_E(TAG, "Wrong number of bits in key");
break;
}
ret = true;
} while(false);
return ret;
}
void ws_protocol_decoder_acurite_592txr_get_string(void* context, FuriString* output) {
furi_assert(context);
WSProtocolDecoderAcurite_592TXR* instance = context;
furi_string_printf(
output,
"%s %dbit\r\n"
"Key:0x%lX%08lX\r\n"
"Sn:0x%lX Ch:%d Bat:%d\r\n"
"Temp:%3.1f C Hum:%d%%",
instance->generic.protocol_name,
instance->generic.data_count_bit,
(uint32_t)(instance->generic.data >> 32),
(uint32_t)(instance->generic.data),
instance->generic.id,
instance->generic.channel,
instance->generic.battery_low,
(double)instance->generic.temp,
instance->generic.humidity);
}