flipperzero-firmware/applications/plugins/weather_station/protocols/nexus_th.c
2022-11-07 02:30:02 +09:00

261 lines
9.4 KiB
C

#include "nexus_th.h"
#define TAG "WSProtocolNexus_TH"
/*
* Help
* https://github.com/merbanan/rtl_433/blob/master/src/devices/nexus.c
*
* Nexus sensor protocol with ID, temperature and optional humidity
* also FreeTec (Pearl) NC-7345 sensors for FreeTec Weatherstation NC-7344,
* also infactory/FreeTec (Pearl) NX-3980 sensors for infactory/FreeTec NX-3974 station,
* also Solight TE82S sensors for Solight TE76/TE82/TE83/TE84 stations,
* also TFA 30.3209.02 temperature/humidity sensor.
* The sensor sends 36 bits 12 times,
* the packets are ppm modulated (distance coding) with a pulse of ~500 us
* followed by a short gap of ~1000 us for a 0 bit or a long ~2000 us gap for a
* 1 bit, the sync gap is ~4000 us.
* The data is grouped in 9 nibbles:
* [id0] [id1] [flags] [temp0] [temp1] [temp2] [const] [humi0] [humi1]
* - The 8-bit id changes when the battery is changed in the sensor.
* - flags are 4 bits B 0 C C, where B is the battery status: 1=OK, 0=LOW
* - and CC is the channel: 0=CH1, 1=CH2, 2=CH3
* - temp is 12 bit signed scaled by 10
* - const is always 1111 (0x0F)
* - humidity is 8 bits
* The sensors can be bought at Clas Ohlsen (Nexus) and Pearl (infactory/FreeTec).
*
*/
#define NEXUS_TH_CONST_DATA 0b1111
static const SubGhzBlockConst ws_protocol_nexus_th_const = {
.te_short = 500,
.te_long = 2000,
.te_delta = 150,
.min_count_bit_for_found = 36,
};
struct WSProtocolDecoderNexus_TH {
SubGhzProtocolDecoderBase base;
SubGhzBlockDecoder decoder;
WSBlockGeneric generic;
};
struct WSProtocolEncoderNexus_TH {
SubGhzProtocolEncoderBase base;
SubGhzProtocolBlockEncoder encoder;
WSBlockGeneric generic;
};
typedef enum {
Nexus_THDecoderStepReset = 0,
Nexus_THDecoderStepSaveDuration,
Nexus_THDecoderStepCheckDuration,
} Nexus_THDecoderStep;
const SubGhzProtocolDecoder ws_protocol_nexus_th_decoder = {
.alloc = ws_protocol_decoder_nexus_th_alloc,
.free = ws_protocol_decoder_nexus_th_free,
.feed = ws_protocol_decoder_nexus_th_feed,
.reset = ws_protocol_decoder_nexus_th_reset,
.get_hash_data = ws_protocol_decoder_nexus_th_get_hash_data,
.serialize = ws_protocol_decoder_nexus_th_serialize,
.deserialize = ws_protocol_decoder_nexus_th_deserialize,
.get_string = ws_protocol_decoder_nexus_th_get_string,
};
const SubGhzProtocolEncoder ws_protocol_nexus_th_encoder = {
.alloc = NULL,
.free = NULL,
.deserialize = NULL,
.stop = NULL,
.yield = NULL,
};
const SubGhzProtocol ws_protocol_nexus_th = {
.name = WS_PROTOCOL_NEXUS_TH_NAME,
.type = SubGhzProtocolWeatherStation,
.flag = SubGhzProtocolFlag_433 | SubGhzProtocolFlag_315 | SubGhzProtocolFlag_868 |
SubGhzProtocolFlag_AM | SubGhzProtocolFlag_Decodable,
.decoder = &ws_protocol_nexus_th_decoder,
.encoder = &ws_protocol_nexus_th_encoder,
};
void* ws_protocol_decoder_nexus_th_alloc(SubGhzEnvironment* environment) {
UNUSED(environment);
WSProtocolDecoderNexus_TH* instance = malloc(sizeof(WSProtocolDecoderNexus_TH));
instance->base.protocol = &ws_protocol_nexus_th;
instance->generic.protocol_name = instance->base.protocol->name;
return instance;
}
void ws_protocol_decoder_nexus_th_free(void* context) {
furi_assert(context);
WSProtocolDecoderNexus_TH* instance = context;
free(instance);
}
void ws_protocol_decoder_nexus_th_reset(void* context) {
furi_assert(context);
WSProtocolDecoderNexus_TH* instance = context;
instance->decoder.parser_step = Nexus_THDecoderStepReset;
}
static bool ws_protocol_nexus_th_check(WSProtocolDecoderNexus_TH* instance) {
uint8_t type = (instance->decoder.decode_data >> 8) & 0x0F;
if((type == NEXUS_TH_CONST_DATA) && ((instance->decoder.decode_data >> 4) != 0xffffffff)) {
return true;
} else {
return false;
}
return true;
}
/**
* Analysis of received data
* @param instance Pointer to a WSBlockGeneric* instance
*/
static void ws_protocol_nexus_th_remote_controller(WSBlockGeneric* instance) {
instance->id = (instance->data >> 28) & 0xFF;
instance->battery_low = !((instance->data >> 27) & 1);
instance->channel = ((instance->data >> 24) & 0x03) + 1;
instance->btn = WS_NO_BTN;
if(!((instance->data >> 23) & 1)) {
instance->temp = (float)((instance->data >> 12) & 0x07FF) / 10.0f;
} else {
instance->temp = (float)((~(instance->data >> 12) & 0x07FF) + 1) / -10.0f;
}
instance->humidity = instance->data & 0xFF;
}
void ws_protocol_decoder_nexus_th_feed(void* context, bool level, uint32_t duration) {
furi_assert(context);
WSProtocolDecoderNexus_TH* instance = context;
switch(instance->decoder.parser_step) {
case Nexus_THDecoderStepReset:
if((!level) && (DURATION_DIFF(duration, ws_protocol_nexus_th_const.te_short * 8) <
ws_protocol_nexus_th_const.te_delta * 4)) {
//Found sync
instance->decoder.parser_step = Nexus_THDecoderStepSaveDuration;
instance->decoder.decode_data = 0;
instance->decoder.decode_count_bit = 0;
}
break;
case Nexus_THDecoderStepSaveDuration:
if(level) {
instance->decoder.te_last = duration;
instance->decoder.parser_step = Nexus_THDecoderStepCheckDuration;
} else {
instance->decoder.parser_step = Nexus_THDecoderStepReset;
}
break;
case Nexus_THDecoderStepCheckDuration:
if(!level) {
if(DURATION_DIFF(duration, ws_protocol_nexus_th_const.te_short * 8) <
ws_protocol_nexus_th_const.te_delta * 4) {
//Found sync
instance->decoder.parser_step = Nexus_THDecoderStepReset;
if((instance->decoder.decode_count_bit ==
ws_protocol_nexus_th_const.min_count_bit_for_found) &&
ws_protocol_nexus_th_check(instance)) {
instance->generic.data = instance->decoder.decode_data;
instance->generic.data_count_bit = instance->decoder.decode_count_bit;
ws_protocol_nexus_th_remote_controller(&instance->generic);
if(instance->base.callback)
instance->base.callback(&instance->base, instance->base.context);
instance->decoder.parser_step = Nexus_THDecoderStepCheckDuration;
}
instance->decoder.decode_data = 0;
instance->decoder.decode_count_bit = 0;
break;
} else if(
(DURATION_DIFF(instance->decoder.te_last, ws_protocol_nexus_th_const.te_short) <
ws_protocol_nexus_th_const.te_delta) &&
(DURATION_DIFF(duration, ws_protocol_nexus_th_const.te_short * 2) <
ws_protocol_nexus_th_const.te_delta * 2)) {
subghz_protocol_blocks_add_bit(&instance->decoder, 0);
instance->decoder.parser_step = Nexus_THDecoderStepSaveDuration;
} else if(
(DURATION_DIFF(instance->decoder.te_last, ws_protocol_nexus_th_const.te_short) <
ws_protocol_nexus_th_const.te_delta) &&
(DURATION_DIFF(duration, ws_protocol_nexus_th_const.te_short * 4) <
ws_protocol_nexus_th_const.te_delta * 4)) {
subghz_protocol_blocks_add_bit(&instance->decoder, 1);
instance->decoder.parser_step = Nexus_THDecoderStepSaveDuration;
} else {
instance->decoder.parser_step = Nexus_THDecoderStepReset;
}
} else {
instance->decoder.parser_step = Nexus_THDecoderStepReset;
}
break;
}
}
uint8_t ws_protocol_decoder_nexus_th_get_hash_data(void* context) {
furi_assert(context);
WSProtocolDecoderNexus_TH* instance = context;
return subghz_protocol_blocks_get_hash_data(
&instance->decoder, (instance->decoder.decode_count_bit / 8) + 1);
}
bool ws_protocol_decoder_nexus_th_serialize(
void* context,
FlipperFormat* flipper_format,
SubGhzRadioPreset* preset) {
furi_assert(context);
WSProtocolDecoderNexus_TH* instance = context;
return ws_block_generic_serialize(&instance->generic, flipper_format, preset);
}
bool ws_protocol_decoder_nexus_th_deserialize(void* context, FlipperFormat* flipper_format) {
furi_assert(context);
WSProtocolDecoderNexus_TH* instance = context;
bool ret = false;
do {
if(!ws_block_generic_deserialize(&instance->generic, flipper_format)) {
break;
}
if(instance->generic.data_count_bit !=
ws_protocol_nexus_th_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_nexus_th_get_string(void* context, FuriString* output) {
furi_assert(context);
WSProtocolDecoderNexus_TH* 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);
}