flipperzero-firmware/applications/plugins/weather_station/protocols/lacrosse_tx141thbv2.c

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#include "lacrosse_tx141thbv2.h"
#define TAG "WSProtocolLaCrosse_TX141THBv2"
/*
* Help
* https://github.com/merbanan/rtl_433/blob/master/src/devices/lacrosse_tx141x.c
*
* iiii iiii | bkcc tttt | tttt tttt | hhhh hhhh | cccc cccc | u
* - i: identification; changes on battery switch
* - c: lfsr_digest8_reflect;
* - u: unknown;
* - b: battery low; flag to indicate low battery voltage
* - h: Humidity;
* - t: Temperature; in °F as binary number with one decimal place + 50 °F offset
* - n: Channel; Channel number 1 - 3
*/
static const SubGhzBlockConst ws_protocol_lacrosse_tx141thbv2_const = {
.te_short = 250,
.te_long = 500,
.te_delta = 120,
.min_count_bit_for_found = 41,
};
struct WSProtocolDecoderLaCrosse_TX141THBv2 {
SubGhzProtocolDecoderBase base;
SubGhzBlockDecoder decoder;
WSBlockGeneric generic;
uint16_t header_count;
};
struct WSProtocolEncoderLaCrosse_TX141THBv2 {
SubGhzProtocolEncoderBase base;
SubGhzProtocolBlockEncoder encoder;
WSBlockGeneric generic;
};
typedef enum {
LaCrosse_TX141THBv2DecoderStepReset = 0,
LaCrosse_TX141THBv2DecoderStepCheckPreambule,
LaCrosse_TX141THBv2DecoderStepSaveDuration,
LaCrosse_TX141THBv2DecoderStepCheckDuration,
} LaCrosse_TX141THBv2DecoderStep;
const SubGhzProtocolDecoder ws_protocol_lacrosse_tx141thbv2_decoder = {
.alloc = ws_protocol_decoder_lacrosse_tx141thbv2_alloc,
.free = ws_protocol_decoder_lacrosse_tx141thbv2_free,
.feed = ws_protocol_decoder_lacrosse_tx141thbv2_feed,
.reset = ws_protocol_decoder_lacrosse_tx141thbv2_reset,
.get_hash_data = ws_protocol_decoder_lacrosse_tx141thbv2_get_hash_data,
.serialize = ws_protocol_decoder_lacrosse_tx141thbv2_serialize,
.deserialize = ws_protocol_decoder_lacrosse_tx141thbv2_deserialize,
.get_string = ws_protocol_decoder_lacrosse_tx141thbv2_get_string,
};
const SubGhzProtocolEncoder ws_protocol_lacrosse_tx141thbv2_encoder = {
.alloc = NULL,
.free = NULL,
.deserialize = NULL,
.stop = NULL,
.yield = NULL,
};
const SubGhzProtocol ws_protocol_lacrosse_tx141thbv2 = {
.name = WS_PROTOCOL_LACROSSE_TX141THBV2_NAME,
.type = SubGhzProtocolWeatherStation,
.flag = SubGhzProtocolFlag_433 | SubGhzProtocolFlag_315 | SubGhzProtocolFlag_868 |
SubGhzProtocolFlag_AM | SubGhzProtocolFlag_Decodable,
.decoder = &ws_protocol_lacrosse_tx141thbv2_decoder,
.encoder = &ws_protocol_lacrosse_tx141thbv2_encoder,
};
void* ws_protocol_decoder_lacrosse_tx141thbv2_alloc(SubGhzEnvironment* environment) {
UNUSED(environment);
WSProtocolDecoderLaCrosse_TX141THBv2* instance =
malloc(sizeof(WSProtocolDecoderLaCrosse_TX141THBv2));
instance->base.protocol = &ws_protocol_lacrosse_tx141thbv2;
instance->generic.protocol_name = instance->base.protocol->name;
return instance;
}
void ws_protocol_decoder_lacrosse_tx141thbv2_free(void* context) {
furi_assert(context);
WSProtocolDecoderLaCrosse_TX141THBv2* instance = context;
free(instance);
}
void ws_protocol_decoder_lacrosse_tx141thbv2_reset(void* context) {
furi_assert(context);
WSProtocolDecoderLaCrosse_TX141THBv2* instance = context;
instance->decoder.parser_step = LaCrosse_TX141THBv2DecoderStepReset;
}
static bool
ws_protocol_lacrosse_tx141thbv2_check_crc(WSProtocolDecoderLaCrosse_TX141THBv2* instance) {
if(!instance->decoder.decode_data) return false;
uint8_t msg[] = {
instance->decoder.decode_data >> 33,
instance->decoder.decode_data >> 25,
instance->decoder.decode_data >> 17,
instance->decoder.decode_data >> 9};
uint8_t crc = subghz_protocol_blocks_lfsr_digest8_reflect(msg, 4, 0x31, 0xF4);
return (crc == ((instance->decoder.decode_data >> 1) & 0xFF));
}
/**
* Analysis of received data
* @param instance Pointer to a WSBlockGeneric* instance
*/
static void ws_protocol_lacrosse_tx141thbv2_remote_controller(WSBlockGeneric* instance) {
instance->id = instance->data >> 33;
instance->battery_low = (instance->data >> 32) & 1;
instance->btn = (instance->data >> 31) & 1;
instance->channel = ((instance->data >> 29) & 0x03) + 1;
instance->temp = ((float)((instance->data >> 17) & 0x0FFF) - 500.0f) / 10.0f;
instance->humidity = (instance->data >> 9) & 0xFF;
}
void ws_protocol_decoder_lacrosse_tx141thbv2_feed(void* context, bool level, uint32_t duration) {
furi_assert(context);
WSProtocolDecoderLaCrosse_TX141THBv2* instance = context;
switch(instance->decoder.parser_step) {
case LaCrosse_TX141THBv2DecoderStepReset:
if((level) &&
(DURATION_DIFF(duration, ws_protocol_lacrosse_tx141thbv2_const.te_short * 3) <
ws_protocol_lacrosse_tx141thbv2_const.te_delta * 2)) {
instance->decoder.parser_step = LaCrosse_TX141THBv2DecoderStepCheckPreambule;
instance->decoder.te_last = duration;
instance->header_count = 0;
}
break;
case LaCrosse_TX141THBv2DecoderStepCheckPreambule:
if(level) {
instance->decoder.te_last = duration;
} else {
if((DURATION_DIFF(
instance->decoder.te_last,
ws_protocol_lacrosse_tx141thbv2_const.te_short * 3) <
ws_protocol_lacrosse_tx141thbv2_const.te_delta * 2) &&
(DURATION_DIFF(duration, ws_protocol_lacrosse_tx141thbv2_const.te_short * 3) <
ws_protocol_lacrosse_tx141thbv2_const.te_delta * 2)) {
//Found preambule
instance->header_count++;
} else if(instance->header_count == 4) {
if((DURATION_DIFF(
instance->decoder.te_last,
ws_protocol_lacrosse_tx141thbv2_const.te_short) <
ws_protocol_lacrosse_tx141thbv2_const.te_delta) &&
(DURATION_DIFF(duration, ws_protocol_lacrosse_tx141thbv2_const.te_long) <
ws_protocol_lacrosse_tx141thbv2_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 = LaCrosse_TX141THBv2DecoderStepSaveDuration;
} else if(
(DURATION_DIFF(
instance->decoder.te_last,
ws_protocol_lacrosse_tx141thbv2_const.te_long) <
ws_protocol_lacrosse_tx141thbv2_const.te_delta) &&
(DURATION_DIFF(duration, ws_protocol_lacrosse_tx141thbv2_const.te_short) <
ws_protocol_lacrosse_tx141thbv2_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 = LaCrosse_TX141THBv2DecoderStepSaveDuration;
} else {
instance->decoder.parser_step = LaCrosse_TX141THBv2DecoderStepReset;
}
} else {
instance->decoder.parser_step = LaCrosse_TX141THBv2DecoderStepReset;
}
}
break;
case LaCrosse_TX141THBv2DecoderStepSaveDuration:
if(level) {
instance->decoder.te_last = duration;
instance->decoder.parser_step = LaCrosse_TX141THBv2DecoderStepCheckDuration;
} else {
instance->decoder.parser_step = LaCrosse_TX141THBv2DecoderStepReset;
}
break;
case LaCrosse_TX141THBv2DecoderStepCheckDuration:
if(!level) {
if(((DURATION_DIFF(
instance->decoder.te_last,
ws_protocol_lacrosse_tx141thbv2_const.te_short * 3) <
ws_protocol_lacrosse_tx141thbv2_const.te_delta * 2) &&
(DURATION_DIFF(duration, ws_protocol_lacrosse_tx141thbv2_const.te_short * 3) <
ws_protocol_lacrosse_tx141thbv2_const.te_delta * 2))) {
if((instance->decoder.decode_count_bit ==
ws_protocol_lacrosse_tx141thbv2_const.min_count_bit_for_found) &&
ws_protocol_lacrosse_tx141thbv2_check_crc(instance)) {
instance->generic.data = instance->decoder.decode_data;
instance->generic.data_count_bit = instance->decoder.decode_count_bit;
ws_protocol_lacrosse_tx141thbv2_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->header_count = 1;
instance->decoder.parser_step = LaCrosse_TX141THBv2DecoderStepCheckPreambule;
break;
} else if(
(DURATION_DIFF(
instance->decoder.te_last, ws_protocol_lacrosse_tx141thbv2_const.te_short) <
ws_protocol_lacrosse_tx141thbv2_const.te_delta) &&
(DURATION_DIFF(duration, ws_protocol_lacrosse_tx141thbv2_const.te_long) <
ws_protocol_lacrosse_tx141thbv2_const.te_delta)) {
subghz_protocol_blocks_add_bit(&instance->decoder, 0);
instance->decoder.parser_step = LaCrosse_TX141THBv2DecoderStepSaveDuration;
} else if(
(DURATION_DIFF(
instance->decoder.te_last, ws_protocol_lacrosse_tx141thbv2_const.te_long) <
ws_protocol_lacrosse_tx141thbv2_const.te_delta) &&
(DURATION_DIFF(duration, ws_protocol_lacrosse_tx141thbv2_const.te_short) <
ws_protocol_lacrosse_tx141thbv2_const.te_delta)) {
subghz_protocol_blocks_add_bit(&instance->decoder, 1);
instance->decoder.parser_step = LaCrosse_TX141THBv2DecoderStepSaveDuration;
} else {
instance->decoder.parser_step = LaCrosse_TX141THBv2DecoderStepReset;
}
} else {
instance->decoder.parser_step = LaCrosse_TX141THBv2DecoderStepReset;
}
break;
}
}
uint8_t ws_protocol_decoder_lacrosse_tx141thbv2_get_hash_data(void* context) {
furi_assert(context);
WSProtocolDecoderLaCrosse_TX141THBv2* instance = context;
return subghz_protocol_blocks_get_hash_data(
&instance->decoder, (instance->decoder.decode_count_bit / 8) + 1);
}
bool ws_protocol_decoder_lacrosse_tx141thbv2_serialize(
void* context,
FlipperFormat* flipper_format,
SubGhzRadioPreset* preset) {
furi_assert(context);
WSProtocolDecoderLaCrosse_TX141THBv2* instance = context;
return ws_block_generic_serialize(&instance->generic, flipper_format, preset);
}
bool ws_protocol_decoder_lacrosse_tx141thbv2_deserialize(
void* context,
FlipperFormat* flipper_format) {
furi_assert(context);
WSProtocolDecoderLaCrosse_TX141THBv2* instance = context;
bool ret = false;
do {
if(!ws_block_generic_deserialize(&instance->generic, flipper_format)) {
break;
}
if(instance->generic.data_count_bit !=
ws_protocol_lacrosse_tx141thbv2_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_lacrosse_tx141thbv2_get_string(void* context, FuriString* output) {
furi_assert(context);
WSProtocolDecoderLaCrosse_TX141THBv2* 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:%d.%d 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,
(int16_t)instance->generic.temp,
abs(((int16_t)(instance->generic.temp * 10) - (((int16_t)instance->generic.temp) * 10))),
instance->generic.humidity);
}