330 lines
13 KiB
C
330 lines
13 KiB
C
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#include "lacrosse_tx.h"
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#define TAG "WSProtocolLaCrosse_TX"
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/*
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* Help
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* https://github.com/merbanan/rtl_433/blob/master/src/devices/lacrosse.c
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*
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*
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* LaCrosse TX 433 Mhz Temperature and Humidity Sensors.
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* - Tested: TX-7U and TX-6U (Temperature only)
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* - Not Tested but should work: TX-3, TX-4
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* - also TFA Dostmann 30.3120.90 sensor (for e.g. 35.1018.06 (WS-9015) station)
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* - also TFA Dostmann 30.3121 sensor
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* Protocol Documentation: http://www.f6fbb.org/domo/sensors/tx3_th.php
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* Message is 44 bits, 11 x 4 bit nybbles:
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* [00] [cnt = 10] [type] [addr] [addr + parity] [v1] [v2] [v3] [iv1] [iv2] [check]
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* Notes:
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* - Zero Pulses are longer (1,400 uS High, 1,000 uS Low) = 2,400 uS
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* - One Pulses are shorter ( 550 uS High, 1,000 uS Low) = 1,600 uS
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* - Sensor id changes when the battery is changed
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* - Primary Value are BCD with one decimal place: vvv = 12.3
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* - Secondary value is integer only intval = 12, seems to be a repeat of primary
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* This may actually be an additional data check because the 4 bit checksum
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* and parity bit is pretty week at detecting errors.
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* - Temperature is in Celsius with 50.0 added (to handle negative values)
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* - Humidity values appear to be integer precision, decimal always 0.
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* - There is a 4 bit checksum and a parity bit covering the three digit value
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* - Parity check for TX-3 and TX-4 might be different.
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* - Msg sent with one repeat after 30 mS
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* - Temperature and humidity are sent as separate messages
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* - Frequency for each sensor may be could be off by as much as 50-75 khz
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* - LaCrosse Sensors in other frequency ranges (915 Mhz) use FSK not OOK
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* so they can't be decoded by rtl_433 currently.
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* - Temperature and Humidity are sent in different messages bursts.
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*/
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#define LACROSSE_TX_GAP 1000
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#define LACROSSE_TX_BIT_SIZE 44
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#define LACROSSE_TX_SUNC_PATTERN 0x0A000000000
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#define LACROSSE_TX_SUNC_MASK 0x0F000000000
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#define LACROSSE_TX_MSG_TYPE_TEMP 0x00
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#define LACROSSE_TX_MSG_TYPE_HUM 0x0E
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static const SubGhzBlockConst ws_protocol_lacrosse_tx_const = {
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.te_short = 550,
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.te_long = 1300,
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.te_delta = 120,
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.min_count_bit_for_found = 40,
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};
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struct WSProtocolDecoderLaCrosse_TX {
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SubGhzProtocolDecoderBase base;
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SubGhzBlockDecoder decoder;
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WSBlockGeneric generic;
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uint16_t header_count;
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};
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struct WSProtocolEncoderLaCrosse_TX {
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SubGhzProtocolEncoderBase base;
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SubGhzProtocolBlockEncoder encoder;
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WSBlockGeneric generic;
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};
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typedef enum {
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LaCrosse_TXDecoderStepReset = 0,
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LaCrosse_TXDecoderStepCheckPreambule,
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LaCrosse_TXDecoderStepSaveDuration,
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LaCrosse_TXDecoderStepCheckDuration,
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} LaCrosse_TXDecoderStep;
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const SubGhzProtocolDecoder ws_protocol_lacrosse_tx_decoder = {
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.alloc = ws_protocol_decoder_lacrosse_tx_alloc,
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.free = ws_protocol_decoder_lacrosse_tx_free,
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.feed = ws_protocol_decoder_lacrosse_tx_feed,
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.reset = ws_protocol_decoder_lacrosse_tx_reset,
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.get_hash_data = ws_protocol_decoder_lacrosse_tx_get_hash_data,
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.serialize = ws_protocol_decoder_lacrosse_tx_serialize,
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.deserialize = ws_protocol_decoder_lacrosse_tx_deserialize,
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.get_string = ws_protocol_decoder_lacrosse_tx_get_string,
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};
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const SubGhzProtocolEncoder ws_protocol_lacrosse_tx_encoder = {
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.alloc = NULL,
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.free = NULL,
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.deserialize = NULL,
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.stop = NULL,
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.yield = NULL,
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};
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const SubGhzProtocol ws_protocol_lacrosse_tx = {
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.name = WS_PROTOCOL_LACROSSE_TX_NAME,
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.type = SubGhzProtocolWeatherStation,
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.flag = SubGhzProtocolFlag_433 | SubGhzProtocolFlag_315 | SubGhzProtocolFlag_868 |
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SubGhzProtocolFlag_AM | SubGhzProtocolFlag_Decodable,
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.decoder = &ws_protocol_lacrosse_tx_decoder,
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.encoder = &ws_protocol_lacrosse_tx_encoder,
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};
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void* ws_protocol_decoder_lacrosse_tx_alloc(SubGhzEnvironment* environment) {
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UNUSED(environment);
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WSProtocolDecoderLaCrosse_TX* instance = malloc(sizeof(WSProtocolDecoderLaCrosse_TX));
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instance->base.protocol = &ws_protocol_lacrosse_tx;
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instance->generic.protocol_name = instance->base.protocol->name;
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return instance;
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}
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void ws_protocol_decoder_lacrosse_tx_free(void* context) {
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furi_assert(context);
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WSProtocolDecoderLaCrosse_TX* instance = context;
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free(instance);
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}
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void ws_protocol_decoder_lacrosse_tx_reset(void* context) {
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furi_assert(context);
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WSProtocolDecoderLaCrosse_TX* instance = context;
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instance->header_count = 0;
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instance->decoder.parser_step = LaCrosse_TXDecoderStepReset;
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}
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static bool ws_protocol_lacrosse_tx_check_crc(WSProtocolDecoderLaCrosse_TX* instance) {
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if(!instance->decoder.decode_data) return false;
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uint8_t msg[] = {
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(instance->decoder.decode_data >> 36) & 0x0F,
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(instance->decoder.decode_data >> 32) & 0x0F,
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(instance->decoder.decode_data >> 28) & 0x0F,
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(instance->decoder.decode_data >> 24) & 0x0F,
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(instance->decoder.decode_data >> 20) & 0x0F,
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(instance->decoder.decode_data >> 16) & 0x0F,
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(instance->decoder.decode_data >> 12) & 0x0F,
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(instance->decoder.decode_data >> 8) & 0x0F,
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(instance->decoder.decode_data >> 4) & 0x0F};
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uint8_t crc = subghz_protocol_blocks_add_bytes(msg, 9);
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return ((crc & 0x0F) == ((instance->decoder.decode_data) & 0x0F));
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}
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/**
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* Analysis of received data
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* @param instance Pointer to a WSBlockGeneric* instance
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*/
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static void ws_protocol_lacrosse_tx_remote_controller(WSBlockGeneric* instance) {
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uint8_t msg_type = (instance->data >> 32) & 0x0F;
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instance->id = (((instance->data >> 28) & 0x0F) << 3) | (((instance->data >> 24) & 0x0F) >> 1);
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float msg_value = (float)((instance->data >> 20) & 0x0F) * 10.0f +
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(float)((instance->data >> 16) & 0x0F) +
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(float)((instance->data >> 12) & 0x0F) * 0.1f;
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if(msg_type == LACROSSE_TX_MSG_TYPE_TEMP) { //-V1051
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instance->temp = msg_value - 50.0f;
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instance->humidity = WS_NO_HUMIDITY;
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} else if(msg_type == LACROSSE_TX_MSG_TYPE_HUM) {
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//ToDo for verification, records are needed with sensors maintaining temperature and temperature for this standard
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instance->humidity = (uint8_t)msg_value;
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} else {
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furi_crash("WS: WSProtocolLaCrosse_TX incorrect msg_type.");
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}
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instance->btn = WS_NO_BTN;
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instance->battery_low = WS_NO_BATT;
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instance->channel = WS_NO_CHANNEL;
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}
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void ws_protocol_decoder_lacrosse_tx_feed(void* context, bool level, uint32_t duration) {
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furi_assert(context);
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WSProtocolDecoderLaCrosse_TX* instance = context;
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switch(instance->decoder.parser_step) {
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case LaCrosse_TXDecoderStepReset:
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if((!level) && (DURATION_DIFF(duration, LACROSSE_TX_GAP) <
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ws_protocol_lacrosse_tx_const.te_delta * 2)) {
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instance->decoder.parser_step = LaCrosse_TXDecoderStepCheckPreambule;
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instance->header_count = 0;
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}
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break;
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case LaCrosse_TXDecoderStepCheckPreambule:
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if(level) {
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if((DURATION_DIFF(duration, ws_protocol_lacrosse_tx_const.te_short) <
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ws_protocol_lacrosse_tx_const.te_delta) &&
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(instance->header_count > 1)) {
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instance->decoder.parser_step = LaCrosse_TXDecoderStepCheckDuration;
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instance->decoder.decode_data = 0;
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instance->decoder.decode_count_bit = 0;
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instance->decoder.te_last = duration;
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} else if(duration > (ws_protocol_lacrosse_tx_const.te_long * 2)) {
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instance->decoder.parser_step = LaCrosse_TXDecoderStepReset;
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}
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} else {
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if(DURATION_DIFF(duration, LACROSSE_TX_GAP) <
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ws_protocol_lacrosse_tx_const.te_delta * 2) {
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instance->decoder.te_last = duration;
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instance->header_count++;
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} else {
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instance->decoder.parser_step = LaCrosse_TXDecoderStepReset;
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}
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}
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break;
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case LaCrosse_TXDecoderStepSaveDuration:
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if(level) {
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instance->decoder.te_last = duration;
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instance->decoder.parser_step = LaCrosse_TXDecoderStepCheckDuration;
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} else {
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instance->decoder.parser_step = LaCrosse_TXDecoderStepReset;
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}
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break;
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case LaCrosse_TXDecoderStepCheckDuration:
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if(!level) {
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if(duration > LACROSSE_TX_GAP * 3) {
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if(DURATION_DIFF(
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instance->decoder.te_last, ws_protocol_lacrosse_tx_const.te_short) <
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ws_protocol_lacrosse_tx_const.te_delta) {
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subghz_protocol_blocks_add_bit(&instance->decoder, 1);
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instance->decoder.parser_step = LaCrosse_TXDecoderStepSaveDuration;
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} else if(
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DURATION_DIFF(
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instance->decoder.te_last, ws_protocol_lacrosse_tx_const.te_long) <
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ws_protocol_lacrosse_tx_const.te_delta) {
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subghz_protocol_blocks_add_bit(&instance->decoder, 0);
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instance->decoder.parser_step = LaCrosse_TXDecoderStepSaveDuration;
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}
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if((instance->decoder.decode_data & LACROSSE_TX_SUNC_MASK) ==
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LACROSSE_TX_SUNC_PATTERN) {
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if(ws_protocol_lacrosse_tx_check_crc(instance)) {
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instance->generic.data = instance->decoder.decode_data;
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instance->generic.data_count_bit = LACROSSE_TX_BIT_SIZE;
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ws_protocol_lacrosse_tx_remote_controller(&instance->generic);
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if(instance->base.callback)
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instance->base.callback(&instance->base, instance->base.context);
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}
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}
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instance->decoder.decode_data = 0;
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instance->decoder.decode_count_bit = 0;
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instance->header_count = 0;
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instance->decoder.parser_step = LaCrosse_TXDecoderStepReset;
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break;
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} else if(
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(DURATION_DIFF(instance->decoder.te_last, ws_protocol_lacrosse_tx_const.te_short) <
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ws_protocol_lacrosse_tx_const.te_delta) &&
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(DURATION_DIFF(duration, LACROSSE_TX_GAP) <
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ws_protocol_lacrosse_tx_const.te_delta * 2)) {
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subghz_protocol_blocks_add_bit(&instance->decoder, 1);
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instance->decoder.parser_step = LaCrosse_TXDecoderStepSaveDuration;
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} else if(
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(DURATION_DIFF(instance->decoder.te_last, ws_protocol_lacrosse_tx_const.te_long) <
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ws_protocol_lacrosse_tx_const.te_delta) &&
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(DURATION_DIFF(duration, LACROSSE_TX_GAP) <
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ws_protocol_lacrosse_tx_const.te_delta * 2)) {
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subghz_protocol_blocks_add_bit(&instance->decoder, 0);
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instance->decoder.parser_step = LaCrosse_TXDecoderStepSaveDuration;
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} else {
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instance->decoder.parser_step = LaCrosse_TXDecoderStepReset;
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}
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} else {
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instance->decoder.parser_step = LaCrosse_TXDecoderStepReset;
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}
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break;
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}
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}
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uint8_t ws_protocol_decoder_lacrosse_tx_get_hash_data(void* context) {
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furi_assert(context);
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WSProtocolDecoderLaCrosse_TX* instance = context;
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return subghz_protocol_blocks_get_hash_data(
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&instance->decoder, (instance->decoder.decode_count_bit / 8) + 1);
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}
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bool ws_protocol_decoder_lacrosse_tx_serialize(
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void* context,
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FlipperFormat* flipper_format,
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SubGhzRadioPreset* preset) {
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furi_assert(context);
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WSProtocolDecoderLaCrosse_TX* instance = context;
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return ws_block_generic_serialize(&instance->generic, flipper_format, preset);
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}
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bool ws_protocol_decoder_lacrosse_tx_deserialize(void* context, FlipperFormat* flipper_format) {
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furi_assert(context);
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WSProtocolDecoderLaCrosse_TX* instance = context;
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bool ret = false;
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do {
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if(!ws_block_generic_deserialize(&instance->generic, flipper_format)) {
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break;
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}
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if(instance->generic.data_count_bit !=
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ws_protocol_lacrosse_tx_const.min_count_bit_for_found) {
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FURI_LOG_E(TAG, "Wrong number of bits in key");
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break;
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}
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ret = true;
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} while(false);
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return ret;
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}
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void ws_protocol_decoder_lacrosse_tx_get_string(void* context, FuriString* output) {
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furi_assert(context);
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WSProtocolDecoderLaCrosse_TX* instance = context;
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furi_string_printf(
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output,
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"%s %dbit\r\n"
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"Key:0x%lX%08lX\r\n"
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"Sn:0x%lX Ch:%d Bat:%d\r\n"
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"Temp:%3.1f C Hum:%d%%",
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instance->generic.protocol_name,
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instance->generic.data_count_bit,
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(uint32_t)(instance->generic.data >> 32),
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(uint32_t)(instance->generic.data),
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instance->generic.id,
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instance->generic.channel,
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instance->generic.battery_low,
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(double)instance->generic.temp,
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instance->generic.humidity);
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}
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