mirror of https://github.com/arendst/Tasmota.git
147 lines
4.2 KiB
C++
147 lines
4.2 KiB
C++
/*
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xsns_97_hyt.ino - HYT I2C temperature and humidity sensor support for Tasmota
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Copyright (C) 2020 Thomas Schnittcher
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Copyright (C) 2022 Adjan Kretz, fix compatibility issues with current HYT
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef USE_I2C
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#ifdef USE_HYT
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/*********************************************************************************************\
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* HYT221, HYT271, HYT371 and HYT939 Temperature and Humidity
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* https://www.ist-ag.com/en/products-services/humidity-modules-sensors
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*
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* I2C Address: 0x28
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\*********************************************************************************************/
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#define XSNS_97 97
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#define XI2C_68 68 // See I2CDEVICES.md
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#define HYT_ADDR 0x28 // I2C address of HYT 221, 271, 371 etc.
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struct HYT {
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float humidity = NAN;
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float temperature = NAN;
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uint8_t bus;
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uint8_t valid = 0;
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uint8_t count = 0;
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char name[6] = "HYT";
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} HYT;
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bool HYT_Read(void) {
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if (HYT.valid) { HYT.valid--; }
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/*
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TwoWire& myWire = I2cGetWire(HYT.bus);
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if (&myWire == nullptr) { return false; } // No valid I2c bus
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myWire.beginTransmission(HYT_ADDR);
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myWire.requestFrom(HYT_ADDR, 4);
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if (myWire.available() == 4) {
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uint8_t data1 = myWire.read();
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uint8_t data2 = myWire.read();
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uint8_t data3 = myWire.read();
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uint8_t data4 = myWire.read();
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myWire.endTransmission();
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// Convert the data to 14-bits
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float humidity = ((((data1 & 0x3F) * 256) + data2) * 100.0) / 16383.0;
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int temp = ((data3 * 256) + (data4 & 0xFC)) / 4;
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float temperature = (temp / 16384.0) * 165.0 - 40.0;
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HYT.humidity = ConvertHumidity(humidity);
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HYT.temperature = ConvertTemp(temperature);
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}
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*/
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uint8_t data[4];
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if (!I2cReadBuffer(HYT_ADDR, -1, data, 4, HYT.bus)) {
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// Convert the data to 14-bits
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float humidity = ((((data[0] & 0x3F) * 256) + data[1]) * 100.0) / 16383.0;
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int temp = ((data[2] * 256) + (data[3] & 0xFC)) / 4;
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float temperature = (temp / 16384.0) * 165.0 - 40.0;
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HYT.humidity = ConvertHumidity(humidity);
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HYT.temperature = ConvertTemp(temperature);
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}
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if (isnan(HYT.temperature) || isnan(HYT.humidity)) { return false; }
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HYT.valid = SENSOR_MAX_MISS;
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// HYT.valid = 1;
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return true;
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}
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/********************************************************************************************/
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void HYT_Detect(void) {
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for (HYT.bus = 0; HYT.bus < 2; HYT.bus++) {
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if (!I2cSetDevice(HYT_ADDR, HYT.bus)) { continue; }
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if (HYT_Read()) {
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I2cSetActiveFound(HYT_ADDR, "HYT", HYT.bus);
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HYT.count = 1;
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break;
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}
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}
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}
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/********************************************************************************************/
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void HYT_EverySecond(void) {
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if (!(TasmotaGlobal.uptime %4)) { // Every 4 seconds
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if (!HYT_Read()) {
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AddLogMissed(HYT.name, HYT.valid);
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}
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}
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}
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void HYT_Show(bool json) {
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if (HYT.valid) {
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TempHumDewShow(json, (0 == TasmotaGlobal.tele_period), HYT.name, HYT.temperature, HYT.humidity);
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}
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}
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/*********************************************************************************************\
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* Interface
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\*********************************************************************************************/
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bool Xsns97(uint32_t function) {
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if (!I2cEnabled(XI2C_68)) { return false; }
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bool result = false;
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if (FUNC_INIT == function) {
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HYT_Detect();
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}
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else if (HYT.count) {
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switch (function) {
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case FUNC_EVERY_SECOND:
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HYT_EverySecond();
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break;
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case FUNC_JSON_APPEND:
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HYT_Show(1);
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break;
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#ifdef USE_WEBSERVER
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case FUNC_WEB_SENSOR:
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HYT_Show(0);
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break;
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#endif // USE_WEBSERVER
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}
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}
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return result;
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}
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#endif // USE_HYT
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#endif // USE_I2C
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