flipperzero-firmware/applications/external/weather_station/protocols/lacrosse_tx.c

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#include "lacrosse_tx.h"
#define TAG "WSProtocolLaCrosse_TX"
/*
* Help
* https://github.com/merbanan/rtl_433/blob/master/src/devices/lacrosse.c
*
*
* LaCrosse TX 433 Mhz Temperature and Humidity Sensors.
* - Tested: TX-7U and TX-6U (Temperature only)
* - Not Tested but should work: TX-3, TX-4
* - also TFA Dostmann 30.3120.90 sensor (for e.g. 35.1018.06 (WS-9015) station)
* - also TFA Dostmann 30.3121 sensor
* Protocol Documentation: http://www.f6fbb.org/domo/sensors/tx3_th.php
* Message is 44 bits, 11 x 4 bit nybbles:
* [00] [cnt = 10] [type] [addr] [addr + parity] [v1] [v2] [v3] [iv1] [iv2] [check]
* Notes:
* - Zero Pulses are longer (1,400 uS High, 1,000 uS Low) = 2,400 uS
* - One Pulses are shorter ( 550 uS High, 1,000 uS Low) = 1,600 uS
* - Sensor id changes when the battery is changed
* - Primary Value are BCD with one decimal place: vvv = 12.3
* - Secondary value is integer only intval = 12, seems to be a repeat of primary
* This may actually be an additional data check because the 4 bit checksum
* and parity bit is pretty week at detecting errors.
* - Temperature is in Celsius with 50.0 added (to handle negative values)
* - Humidity values appear to be integer precision, decimal always 0.
* - There is a 4 bit checksum and a parity bit covering the three digit value
* - Parity check for TX-3 and TX-4 might be different.
* - Msg sent with one repeat after 30 mS
* - Temperature and humidity are sent as separate messages
* - Frequency for each sensor may be could be off by as much as 50-75 khz
* - LaCrosse Sensors in other frequency ranges (915 Mhz) use FSK not OOK
* so they can't be decoded by rtl_433 currently.
* - Temperature and Humidity are sent in different messages bursts.
*/
#define LACROSSE_TX_GAP 1000
#define LACROSSE_TX_BIT_SIZE 44
#define LACROSSE_TX_SUNC_PATTERN 0x0A000000000
#define LACROSSE_TX_SUNC_MASK 0x0F000000000
#define LACROSSE_TX_MSG_TYPE_TEMP 0x00
#define LACROSSE_TX_MSG_TYPE_HUM 0x0E
static const SubGhzBlockConst ws_protocol_lacrosse_tx_const = {
.te_short = 550,
.te_long = 1300,
.te_delta = 120,
.min_count_bit_for_found = 40,
};
struct WSProtocolDecoderLaCrosse_TX {
SubGhzProtocolDecoderBase base;
SubGhzBlockDecoder decoder;
WSBlockGeneric generic;
uint16_t header_count;
};
struct WSProtocolEncoderLaCrosse_TX {
SubGhzProtocolEncoderBase base;
SubGhzProtocolBlockEncoder encoder;
WSBlockGeneric generic;
};
typedef enum {
LaCrosse_TXDecoderStepReset = 0,
LaCrosse_TXDecoderStepCheckPreambule,
LaCrosse_TXDecoderStepSaveDuration,
LaCrosse_TXDecoderStepCheckDuration,
} LaCrosse_TXDecoderStep;
const SubGhzProtocolDecoder ws_protocol_lacrosse_tx_decoder = {
.alloc = ws_protocol_decoder_lacrosse_tx_alloc,
.free = ws_protocol_decoder_lacrosse_tx_free,
.feed = ws_protocol_decoder_lacrosse_tx_feed,
.reset = ws_protocol_decoder_lacrosse_tx_reset,
.get_hash_data = ws_protocol_decoder_lacrosse_tx_get_hash_data,
.serialize = ws_protocol_decoder_lacrosse_tx_serialize,
.deserialize = ws_protocol_decoder_lacrosse_tx_deserialize,
.get_string = ws_protocol_decoder_lacrosse_tx_get_string,
};
const SubGhzProtocolEncoder ws_protocol_lacrosse_tx_encoder = {
.alloc = NULL,
.free = NULL,
.deserialize = NULL,
.stop = NULL,
.yield = NULL,
};
const SubGhzProtocol ws_protocol_lacrosse_tx = {
.name = WS_PROTOCOL_LACROSSE_TX_NAME,
.type = SubGhzProtocolWeatherStation,
.flag = SubGhzProtocolFlag_433 | SubGhzProtocolFlag_315 | SubGhzProtocolFlag_868 |
SubGhzProtocolFlag_AM | SubGhzProtocolFlag_Decodable,
.decoder = &ws_protocol_lacrosse_tx_decoder,
.encoder = &ws_protocol_lacrosse_tx_encoder,
};
void* ws_protocol_decoder_lacrosse_tx_alloc(SubGhzEnvironment* environment) {
UNUSED(environment);
WSProtocolDecoderLaCrosse_TX* instance = malloc(sizeof(WSProtocolDecoderLaCrosse_TX));
instance->base.protocol = &ws_protocol_lacrosse_tx;
instance->generic.protocol_name = instance->base.protocol->name;
return instance;
}
void ws_protocol_decoder_lacrosse_tx_free(void* context) {
furi_assert(context);
WSProtocolDecoderLaCrosse_TX* instance = context;
free(instance);
}
void ws_protocol_decoder_lacrosse_tx_reset(void* context) {
furi_assert(context);
WSProtocolDecoderLaCrosse_TX* instance = context;
instance->header_count = 0;
instance->decoder.parser_step = LaCrosse_TXDecoderStepReset;
}
static bool ws_protocol_lacrosse_tx_check_crc(WSProtocolDecoderLaCrosse_TX* instance) {
if(!instance->decoder.decode_data) return false;
uint8_t msg[] = {
(instance->decoder.decode_data >> 36) & 0x0F,
(instance->decoder.decode_data >> 32) & 0x0F,
(instance->decoder.decode_data >> 28) & 0x0F,
(instance->decoder.decode_data >> 24) & 0x0F,
(instance->decoder.decode_data >> 20) & 0x0F,
(instance->decoder.decode_data >> 16) & 0x0F,
(instance->decoder.decode_data >> 12) & 0x0F,
(instance->decoder.decode_data >> 8) & 0x0F,
(instance->decoder.decode_data >> 4) & 0x0F};
uint8_t crc = subghz_protocol_blocks_add_bytes(msg, 9);
return ((crc & 0x0F) == ((instance->decoder.decode_data) & 0x0F));
}
/**
* Analysis of received data
* @param instance Pointer to a WSBlockGeneric* instance
*/
static void ws_protocol_lacrosse_tx_remote_controller(WSBlockGeneric* instance) {
uint8_t msg_type = (instance->data >> 32) & 0x0F;
instance->id = (((instance->data >> 28) & 0x0F) << 3) | (((instance->data >> 24) & 0x0F) >> 1);
float msg_value = (float)((instance->data >> 20) & 0x0F) * 10.0f +
(float)((instance->data >> 16) & 0x0F) +
(float)((instance->data >> 12) & 0x0F) * 0.1f;
if(msg_type == LACROSSE_TX_MSG_TYPE_TEMP) { //-V1051
instance->temp = msg_value - 50.0f;
instance->humidity = WS_NO_HUMIDITY;
} else if(msg_type == LACROSSE_TX_MSG_TYPE_HUM) {
//ToDo for verification, records are needed with sensors maintaining temperature and temperature for this standard
instance->humidity = (uint8_t)msg_value;
} else {
furi_crash("WS: WSProtocolLaCrosse_TX incorrect msg_type.");
}
instance->btn = WS_NO_BTN;
instance->battery_low = WS_NO_BATT;
instance->channel = WS_NO_CHANNEL;
}
void ws_protocol_decoder_lacrosse_tx_feed(void* context, bool level, uint32_t duration) {
furi_assert(context);
WSProtocolDecoderLaCrosse_TX* instance = context;
switch(instance->decoder.parser_step) {
case LaCrosse_TXDecoderStepReset:
if((!level) && (DURATION_DIFF(duration, LACROSSE_TX_GAP) <
ws_protocol_lacrosse_tx_const.te_delta * 2)) {
instance->decoder.parser_step = LaCrosse_TXDecoderStepCheckPreambule;
instance->header_count = 0;
}
break;
case LaCrosse_TXDecoderStepCheckPreambule:
if(level) {
if((DURATION_DIFF(duration, ws_protocol_lacrosse_tx_const.te_short) <
ws_protocol_lacrosse_tx_const.te_delta) &&
(instance->header_count > 1)) {
instance->decoder.parser_step = LaCrosse_TXDecoderStepCheckDuration;
instance->decoder.decode_data = 0;
instance->decoder.decode_count_bit = 0;
instance->decoder.te_last = duration;
} else if(duration > (ws_protocol_lacrosse_tx_const.te_long * 2)) {
instance->decoder.parser_step = LaCrosse_TXDecoderStepReset;
}
} else {
if(DURATION_DIFF(duration, LACROSSE_TX_GAP) <
ws_protocol_lacrosse_tx_const.te_delta * 2) {
instance->decoder.te_last = duration;
instance->header_count++;
} else {
instance->decoder.parser_step = LaCrosse_TXDecoderStepReset;
}
}
break;
case LaCrosse_TXDecoderStepSaveDuration:
if(level) {
instance->decoder.te_last = duration;
instance->decoder.parser_step = LaCrosse_TXDecoderStepCheckDuration;
} else {
instance->decoder.parser_step = LaCrosse_TXDecoderStepReset;
}
break;
case LaCrosse_TXDecoderStepCheckDuration:
if(!level) {
if(duration > LACROSSE_TX_GAP * 3) {
if(DURATION_DIFF(
instance->decoder.te_last, ws_protocol_lacrosse_tx_const.te_short) <
ws_protocol_lacrosse_tx_const.te_delta) {
subghz_protocol_blocks_add_bit(&instance->decoder, 1);
instance->decoder.parser_step = LaCrosse_TXDecoderStepSaveDuration;
} else if(
DURATION_DIFF(
instance->decoder.te_last, ws_protocol_lacrosse_tx_const.te_long) <
ws_protocol_lacrosse_tx_const.te_delta) {
subghz_protocol_blocks_add_bit(&instance->decoder, 0);
instance->decoder.parser_step = LaCrosse_TXDecoderStepSaveDuration;
}
if((instance->decoder.decode_data & LACROSSE_TX_SUNC_MASK) ==
LACROSSE_TX_SUNC_PATTERN) {
if(ws_protocol_lacrosse_tx_check_crc(instance)) {
instance->generic.data = instance->decoder.decode_data;
instance->generic.data_count_bit = LACROSSE_TX_BIT_SIZE;
ws_protocol_lacrosse_tx_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 = 0;
instance->decoder.parser_step = LaCrosse_TXDecoderStepReset;
break;
} else if(
(DURATION_DIFF(instance->decoder.te_last, ws_protocol_lacrosse_tx_const.te_short) <
ws_protocol_lacrosse_tx_const.te_delta) &&
(DURATION_DIFF(duration, LACROSSE_TX_GAP) <
ws_protocol_lacrosse_tx_const.te_delta * 2)) {
subghz_protocol_blocks_add_bit(&instance->decoder, 1);
instance->decoder.parser_step = LaCrosse_TXDecoderStepSaveDuration;
} else if(
(DURATION_DIFF(instance->decoder.te_last, ws_protocol_lacrosse_tx_const.te_long) <
ws_protocol_lacrosse_tx_const.te_delta) &&
(DURATION_DIFF(duration, LACROSSE_TX_GAP) <
ws_protocol_lacrosse_tx_const.te_delta * 2)) {
subghz_protocol_blocks_add_bit(&instance->decoder, 0);
instance->decoder.parser_step = LaCrosse_TXDecoderStepSaveDuration;
} else {
instance->decoder.parser_step = LaCrosse_TXDecoderStepReset;
}
} else {
instance->decoder.parser_step = LaCrosse_TXDecoderStepReset;
}
break;
}
}
uint8_t ws_protocol_decoder_lacrosse_tx_get_hash_data(void* context) {
furi_assert(context);
WSProtocolDecoderLaCrosse_TX* instance = context;
return subghz_protocol_blocks_get_hash_data(
&instance->decoder, (instance->decoder.decode_count_bit / 8) + 1);
}
SubGhzProtocolStatus ws_protocol_decoder_lacrosse_tx_serialize(
void* context,
FlipperFormat* flipper_format,
SubGhzRadioPreset* preset) {
furi_assert(context);
WSProtocolDecoderLaCrosse_TX* instance = context;
return ws_block_generic_serialize(&instance->generic, flipper_format, preset);
}
SubGhzProtocolStatus
ws_protocol_decoder_lacrosse_tx_deserialize(void* context, FlipperFormat* flipper_format) {
furi_assert(context);
WSProtocolDecoderLaCrosse_TX* instance = context;
return ws_block_generic_deserialize_check_count_bit(
&instance->generic, flipper_format, ws_protocol_lacrosse_tx_const.min_count_bit_for_found);
}
void ws_protocol_decoder_lacrosse_tx_get_string(void* context, FuriString* output) {
furi_assert(context);
WSProtocolDecoderLaCrosse_TX* 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);
}