278 lines
10 KiB
C
278 lines
10 KiB
C
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#include "ambient_weather.h"
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#include <lib/toolbox/manchester_decoder.h>
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#define TAG "WSProtocolAmbient_Weather"
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/*
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* Help
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* https://github.com/merbanan/rtl_433/blob/master/src/devices/ambient_weather.c
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*
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* Decode Ambient Weather F007TH, F012TH, TF 30.3208.02, SwitchDoc F016TH.
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* Devices supported:
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* - Ambient Weather F007TH Thermo-Hygrometer.
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* - Ambient Weather F012TH Indoor/Display Thermo-Hygrometer.
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* - TFA senders 30.3208.02 from the TFA "Klima-Monitor" 30.3054,
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* - SwitchDoc Labs F016TH.
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* This decoder handles the 433mhz/868mhz thermo-hygrometers.
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* The 915mhz (WH*) family of devices use different modulation/encoding.
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* Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5
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* xxxxMMMM IIIIIIII BCCCTTTT TTTTTTTT HHHHHHHH MMMMMMMM
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* - x: Unknown 0x04 on F007TH/F012TH
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* - M: Model Number?, 0x05 on F007TH/F012TH/SwitchDocLabs F016TH
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* - I: ID byte (8 bits), volatie, changes at power up,
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* - B: Battery Low
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* - C: Channel (3 bits 1-8) - F007TH set by Dip switch, F012TH soft setting
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* - T: Temperature 12 bits - Fahrenheit * 10 + 400
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* - H: Humidity (8 bits)
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* - M: Message integrity check LFSR Digest-8, gen 0x98, key 0x3e, init 0x64
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*
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* three repeats without gap
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* full preamble is 0x00145 (the last bits might not be fixed, e.g. 0x00146)
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* and on decoding also 0xffd45
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*/
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#define AMBIENT_WEATHER_PACKET_HEADER_1 0xFFD440000000000 //0xffd45 .. 0xffd46
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#define AMBIENT_WEATHER_PACKET_HEADER_2 0x001440000000000 //0x00145 .. 0x00146
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#define AMBIENT_WEATHER_PACKET_HEADER_MASK 0xFFFFC0000000000
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static const SubGhzBlockConst ws_protocol_ambient_weather_const = {
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.te_short = 500,
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.te_long = 1000,
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.te_delta = 120,
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.min_count_bit_for_found = 48,
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};
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struct WSProtocolDecoderAmbient_Weather {
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SubGhzProtocolDecoderBase base;
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SubGhzBlockDecoder decoder;
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WSBlockGeneric generic;
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ManchesterState manchester_saved_state;
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uint16_t header_count;
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};
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struct WSProtocolEncoderAmbient_Weather {
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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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const SubGhzProtocolDecoder ws_protocol_ambient_weather_decoder = {
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.alloc = ws_protocol_decoder_ambient_weather_alloc,
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.free = ws_protocol_decoder_ambient_weather_free,
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.feed = ws_protocol_decoder_ambient_weather_feed,
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.reset = ws_protocol_decoder_ambient_weather_reset,
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.get_hash_data = ws_protocol_decoder_ambient_weather_get_hash_data,
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.serialize = ws_protocol_decoder_ambient_weather_serialize,
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.deserialize = ws_protocol_decoder_ambient_weather_deserialize,
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.get_string = ws_protocol_decoder_ambient_weather_get_string,
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};
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const SubGhzProtocolEncoder ws_protocol_ambient_weather_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_ambient_weather = {
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.name = WS_PROTOCOL_AMBIENT_WEATHER_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_ambient_weather_decoder,
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.encoder = &ws_protocol_ambient_weather_encoder,
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};
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void* ws_protocol_decoder_ambient_weather_alloc(SubGhzEnvironment* environment) {
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UNUSED(environment);
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WSProtocolDecoderAmbient_Weather* instance = malloc(sizeof(WSProtocolDecoderAmbient_Weather));
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instance->base.protocol = &ws_protocol_ambient_weather;
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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_ambient_weather_free(void* context) {
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furi_assert(context);
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WSProtocolDecoderAmbient_Weather* instance = context;
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free(instance);
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}
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void ws_protocol_decoder_ambient_weather_reset(void* context) {
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furi_assert(context);
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WSProtocolDecoderAmbient_Weather* instance = context;
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manchester_advance(
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instance->manchester_saved_state,
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ManchesterEventReset,
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&instance->manchester_saved_state,
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NULL);
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}
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static bool ws_protocol_ambient_weather_check_crc(WSProtocolDecoderAmbient_Weather* instance) {
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uint8_t msg[] = {
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instance->decoder.decode_data >> 40,
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instance->decoder.decode_data >> 32,
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instance->decoder.decode_data >> 24,
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instance->decoder.decode_data >> 16,
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instance->decoder.decode_data >> 8};
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uint8_t crc = subghz_protocol_blocks_lfsr_digest8(msg, 5, 0x98, 0x3e) ^ 0x64;
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return (crc == (uint8_t)(instance->decoder.decode_data & 0xFF));
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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_ambient_weather_remote_controller(WSBlockGeneric* instance) {
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instance->id = (instance->data >> 32) & 0xFF;
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instance->battery_low = (instance->data >> 31) & 1;
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instance->channel = ((instance->data >> 28) & 0x07) + 1;
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instance->temp = ws_block_generic_fahrenheit_to_celsius(
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((float)((instance->data >> 16) & 0x0FFF) - 400.0f) / 10.0f);
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instance->humidity = (instance->data >> 8) & 0xFF;
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instance->btn = WS_NO_BTN;
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// ToDo maybe it won't be needed
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/*
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Sanity checks to reduce false positives and other bad data
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Packets with Bad data often pass the MIC check.
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- humidity > 100 (such as 255) and
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- temperatures > 140 F (such as 369.5 F and 348.8 F
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Specs in the F007TH and F012TH manuals state the range is:
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- Temperature: -40 to 140 F
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- Humidity: 10 to 99%
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@todo - sanity check b[0] "model number"
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- 0x45 - F007TH and F012TH
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- 0x?5 - SwitchDocLabs F016TH temperature sensor (based on comment b[0] & 0x0f == 5)
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- ? - TFA 30.3208.02
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if (instance->humidity < 0 || instance->humidity > 100) {
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ERROR;
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}
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if (instance->temp < -40.0 || instance->temp > 140.0) {
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ERROR;
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}
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*/
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}
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void ws_protocol_decoder_ambient_weather_feed(void* context, bool level, uint32_t duration) {
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furi_assert(context);
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WSProtocolDecoderAmbient_Weather* instance = context;
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ManchesterEvent event = ManchesterEventReset;
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if(!level) {
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if(DURATION_DIFF(duration, ws_protocol_ambient_weather_const.te_short) <
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ws_protocol_ambient_weather_const.te_delta) {
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event = ManchesterEventShortLow;
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} else if(
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DURATION_DIFF(duration, ws_protocol_ambient_weather_const.te_long) <
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ws_protocol_ambient_weather_const.te_delta * 2) {
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event = ManchesterEventLongLow;
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}
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} else {
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if(DURATION_DIFF(duration, ws_protocol_ambient_weather_const.te_short) <
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ws_protocol_ambient_weather_const.te_delta) {
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event = ManchesterEventShortHigh;
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} else if(
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DURATION_DIFF(duration, ws_protocol_ambient_weather_const.te_long) <
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ws_protocol_ambient_weather_const.te_delta * 2) {
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event = ManchesterEventLongHigh;
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}
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}
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if(event != ManchesterEventReset) {
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bool data;
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bool data_ok = manchester_advance(
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instance->manchester_saved_state, event, &instance->manchester_saved_state, &data);
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if(data_ok) {
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instance->decoder.decode_data = (instance->decoder.decode_data << 1) | !data;
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}
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if(((instance->decoder.decode_data & AMBIENT_WEATHER_PACKET_HEADER_MASK) ==
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AMBIENT_WEATHER_PACKET_HEADER_1) ||
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((instance->decoder.decode_data & AMBIENT_WEATHER_PACKET_HEADER_MASK) ==
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AMBIENT_WEATHER_PACKET_HEADER_2)) {
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if(ws_protocol_ambient_weather_check_crc(instance)) {
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instance->generic.data = instance->decoder.decode_data;
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instance->generic.data_count_bit =
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ws_protocol_ambient_weather_const.min_count_bit_for_found;
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ws_protocol_ambient_weather_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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instance->decoder.decode_data = 0;
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instance->decoder.decode_count_bit = 0;
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}
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}
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} else {
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instance->decoder.decode_data = 0;
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instance->decoder.decode_count_bit = 0;
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manchester_advance(
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instance->manchester_saved_state,
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ManchesterEventReset,
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&instance->manchester_saved_state,
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NULL);
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}
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}
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uint8_t ws_protocol_decoder_ambient_weather_get_hash_data(void* context) {
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furi_assert(context);
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WSProtocolDecoderAmbient_Weather* 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_ambient_weather_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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WSProtocolDecoderAmbient_Weather* 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_ambient_weather_deserialize(void* context, FlipperFormat* flipper_format) {
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furi_assert(context);
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WSProtocolDecoderAmbient_Weather* 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_ambient_weather_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_ambient_weather_get_string(void* context, FuriString* output) {
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furi_assert(context);
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WSProtocolDecoderAmbient_Weather* 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:%d.%d 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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(int16_t)instance->generic.temp,
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abs(((int16_t)(instance->generic.temp * 10) - (((int16_t)instance->generic.temp) * 10))),
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instance->generic.humidity);
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}
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