flipperzero-firmware/applications/plugins/weather_station/protocols/thermopro_tx4.c

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#include "thermopro_tx4.h"
#define TAG "WSProtocolThermoPRO_TX4"
/*
* Help
* https://github.com/merbanan/rtl_433/blob/master/src/devices/thermopro_tx2.c
*
* The sensor sends 37 bits 6 times, before the first packet there is a sync pulse.
* The packets are ppm modulated (distance coding) with a pulse of ~500 us
* followed by a short gap of ~2000 us for a 0 bit or a long ~4000 us gap for a
* 1 bit, the sync gap is ~9000 us.
* The data is grouped in 9 nibbles
* [type] [id0] [id1] [flags] [temp0] [temp1] [temp2] [humi0] [humi1]
* - type: 4 bit fixed 1001 (9) or 0110 (5)
* - id: 8 bit a random id that is generated when the sensor starts, could include battery status
* the same batteries often generate the same id
* - flags(3): is 1 when the battery is low, otherwise 0 (ok)
* - flags(2): is 1 when the sensor sends a reading when pressing the button on the sensor
* - flags(1,0): the channel number that can be set by the sensor (1, 2, 3, X)
* - temp: 12 bit signed scaled by 10
* - humi: 8 bit always 11001100 (0xCC) if no humidity sensor is available
*
*/
#define THERMO_PRO_TX4_TYPE_1 0b1001
#define THERMO_PRO_TX4_TYPE_2 0b0110
static const SubGhzBlockConst ws_protocol_thermopro_tx4_const = {
.te_short = 500,
.te_long = 2000,
.te_delta = 150,
.min_count_bit_for_found = 37,
};
struct WSProtocolDecoderThermoPRO_TX4 {
SubGhzProtocolDecoderBase base;
SubGhzBlockDecoder decoder;
WSBlockGeneric generic;
};
struct WSProtocolEncoderThermoPRO_TX4 {
SubGhzProtocolEncoderBase base;
SubGhzProtocolBlockEncoder encoder;
WSBlockGeneric generic;
};
typedef enum {
ThermoPRO_TX4DecoderStepReset = 0,
ThermoPRO_TX4DecoderStepSaveDuration,
ThermoPRO_TX4DecoderStepCheckDuration,
} ThermoPRO_TX4DecoderStep;
const SubGhzProtocolDecoder ws_protocol_thermopro_tx4_decoder = {
.alloc = ws_protocol_decoder_thermopro_tx4_alloc,
.free = ws_protocol_decoder_thermopro_tx4_free,
.feed = ws_protocol_decoder_thermopro_tx4_feed,
.reset = ws_protocol_decoder_thermopro_tx4_reset,
.get_hash_data = ws_protocol_decoder_thermopro_tx4_get_hash_data,
.serialize = ws_protocol_decoder_thermopro_tx4_serialize,
.deserialize = ws_protocol_decoder_thermopro_tx4_deserialize,
.get_string = ws_protocol_decoder_thermopro_tx4_get_string,
};
const SubGhzProtocolEncoder ws_protocol_thermopro_tx4_encoder = {
.alloc = NULL,
.free = NULL,
.deserialize = NULL,
.stop = NULL,
.yield = NULL,
};
const SubGhzProtocol ws_protocol_thermopro_tx4 = {
.name = WS_PROTOCOL_THERMOPRO_TX4_NAME,
.type = SubGhzProtocolWeatherStation,
.flag = SubGhzProtocolFlag_433 | SubGhzProtocolFlag_315 | SubGhzProtocolFlag_868 |
SubGhzProtocolFlag_AM | SubGhzProtocolFlag_Decodable,
.decoder = &ws_protocol_thermopro_tx4_decoder,
.encoder = &ws_protocol_thermopro_tx4_encoder,
};
void* ws_protocol_decoder_thermopro_tx4_alloc(SubGhzEnvironment* environment) {
UNUSED(environment);
WSProtocolDecoderThermoPRO_TX4* instance = malloc(sizeof(WSProtocolDecoderThermoPRO_TX4));
instance->base.protocol = &ws_protocol_thermopro_tx4;
instance->generic.protocol_name = instance->base.protocol->name;
return instance;
}
void ws_protocol_decoder_thermopro_tx4_free(void* context) {
furi_assert(context);
WSProtocolDecoderThermoPRO_TX4* instance = context;
free(instance);
}
void ws_protocol_decoder_thermopro_tx4_reset(void* context) {
furi_assert(context);
WSProtocolDecoderThermoPRO_TX4* instance = context;
instance->decoder.parser_step = ThermoPRO_TX4DecoderStepReset;
}
static bool ws_protocol_thermopro_tx4_check(WSProtocolDecoderThermoPRO_TX4* instance) {
uint8_t type = instance->decoder.decode_data >> 33;
if((type == THERMO_PRO_TX4_TYPE_1) || (type == THERMO_PRO_TX4_TYPE_2)) {
return true;
} else {
return false;
}
}
/**
* Analysis of received data
* @param instance Pointer to a WSBlockGeneric* instance
*/
static void ws_protocol_thermopro_tx4_remote_controller(WSBlockGeneric* instance) {
instance->id = (instance->data >> 25) & 0xFF;
instance->battery_low = (instance->data >> 24) & 1;
instance->btn = (instance->data >> 23) & 1;
instance->channel = ((instance->data >> 21) & 0x03) + 1;
if(!((instance->data >> 20) & 1)) {
instance->temp = (float)((instance->data >> 9) & 0x07FF) / 10.0f;
} else {
instance->temp = (float)((~(instance->data >> 9) & 0x07FF) + 1) / -10.0f;
}
instance->humidity = (instance->data >> 1) & 0xFF;
}
void ws_protocol_decoder_thermopro_tx4_feed(void* context, bool level, uint32_t duration) {
furi_assert(context);
WSProtocolDecoderThermoPRO_TX4* instance = context;
switch(instance->decoder.parser_step) {
case ThermoPRO_TX4DecoderStepReset:
if((!level) && (DURATION_DIFF(duration, ws_protocol_thermopro_tx4_const.te_short * 18) <
ws_protocol_thermopro_tx4_const.te_delta * 10)) {
//Found sync
instance->decoder.parser_step = ThermoPRO_TX4DecoderStepSaveDuration;
instance->decoder.decode_data = 0;
instance->decoder.decode_count_bit = 0;
}
break;
case ThermoPRO_TX4DecoderStepSaveDuration:
if(level) {
instance->decoder.te_last = duration;
instance->decoder.parser_step = ThermoPRO_TX4DecoderStepCheckDuration;
} else {
instance->decoder.parser_step = ThermoPRO_TX4DecoderStepReset;
}
break;
case ThermoPRO_TX4DecoderStepCheckDuration:
if(!level) {
if(DURATION_DIFF(duration, ws_protocol_thermopro_tx4_const.te_short * 18) <
ws_protocol_thermopro_tx4_const.te_delta * 10) {
//Found sync
instance->decoder.parser_step = ThermoPRO_TX4DecoderStepReset;
if((instance->decoder.decode_count_bit ==
ws_protocol_thermopro_tx4_const.min_count_bit_for_found) &&
ws_protocol_thermopro_tx4_check(instance)) {
instance->generic.data = instance->decoder.decode_data;
instance->generic.data_count_bit = instance->decoder.decode_count_bit;
ws_protocol_thermopro_tx4_remote_controller(&instance->generic);
if(instance->base.callback)
instance->base.callback(&instance->base, instance->base.context);
instance->decoder.parser_step = ThermoPRO_TX4DecoderStepCheckDuration;
}
instance->decoder.decode_data = 0;
instance->decoder.decode_count_bit = 0;
break;
} else if(
(DURATION_DIFF(
instance->decoder.te_last, ws_protocol_thermopro_tx4_const.te_short) <
ws_protocol_thermopro_tx4_const.te_delta) &&
(DURATION_DIFF(duration, ws_protocol_thermopro_tx4_const.te_long) <
ws_protocol_thermopro_tx4_const.te_delta * 2)) {
subghz_protocol_blocks_add_bit(&instance->decoder, 0);
instance->decoder.parser_step = ThermoPRO_TX4DecoderStepSaveDuration;
} else if(
(DURATION_DIFF(
instance->decoder.te_last, ws_protocol_thermopro_tx4_const.te_short) <
ws_protocol_thermopro_tx4_const.te_delta) &&
(DURATION_DIFF(duration, ws_protocol_thermopro_tx4_const.te_long * 2) <
ws_protocol_thermopro_tx4_const.te_delta * 4)) {
subghz_protocol_blocks_add_bit(&instance->decoder, 1);
instance->decoder.parser_step = ThermoPRO_TX4DecoderStepSaveDuration;
} else {
instance->decoder.parser_step = ThermoPRO_TX4DecoderStepReset;
}
} else {
instance->decoder.parser_step = ThermoPRO_TX4DecoderStepReset;
}
break;
}
}
uint8_t ws_protocol_decoder_thermopro_tx4_get_hash_data(void* context) {
furi_assert(context);
WSProtocolDecoderThermoPRO_TX4* instance = context;
return subghz_protocol_blocks_get_hash_data(
&instance->decoder, (instance->decoder.decode_count_bit / 8) + 1);
}
bool ws_protocol_decoder_thermopro_tx4_serialize(
void* context,
FlipperFormat* flipper_format,
SubGhzRadioPreset* preset) {
furi_assert(context);
WSProtocolDecoderThermoPRO_TX4* instance = context;
return ws_block_generic_serialize(&instance->generic, flipper_format, preset);
}
bool ws_protocol_decoder_thermopro_tx4_deserialize(void* context, FlipperFormat* flipper_format) {
furi_assert(context);
WSProtocolDecoderThermoPRO_TX4* instance = context;
bool ret = false;
do {
if(!ws_block_generic_deserialize(&instance->generic, flipper_format)) {
break;
}
if(instance->generic.data_count_bit !=
ws_protocol_thermopro_tx4_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_thermopro_tx4_get_string(void* context, FuriString* output) {
furi_assert(context);
WSProtocolDecoderThermoPRO_TX4* 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);
}