mirror of https://github.com/arendst/Tasmota.git
137 lines
4.0 KiB
C++
137 lines
4.0 KiB
C++
/*
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xsns_55_hih_series.ino - Honeywell HIH series temperature and humidity sensor support for Tasmota
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Copyright (C) 2021 Theo Arends
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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_HIH6
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/*********************************************************************************************\
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* HIH6130 - Temperature and Humidity
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*
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* https://sensing.honeywell.com/HIH6130-021-001-humidity-sensors
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* https://sensing.honeywell.com/i2c-comms-humidicon-tn-009061-2-en-final-07jun12.pdf
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* https://sensing.honeywell.com/command-mode-humidicon-tn-009062-3-en-final-07jun12.pdf
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* https://github.com/ControlEverythingCommunity/HIH6130/blob/master/Arduino/HIH6130.ino
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*
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* I2C Address: 0x27
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\*********************************************************************************************/
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#define XSNS_55 55
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#define XI2C_36 36 // See I2CDEVICES.md
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#define HIH6_ADDR 0x27
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struct HIH6 {
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float temperature = 0;
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float humidity = 0;
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uint8_t valid = 0;
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uint8_t type = 0;
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char types[4] = "HIH";
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} Hih6;
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bool Hih6Read(void)
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{
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Wire.beginTransmission(HIH6_ADDR);
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if (Wire.endTransmission() != 0) { return false; } // In case of error
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delay(40); // Wait for Valid data (Stale data doesn't work. See #6808)
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uint8_t data[4];
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Wire.requestFrom(HIH6_ADDR, 4);
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if (4 == Wire.available()) {
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data[0] = Wire.read(); // Status and Humidity msb
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data[1] = Wire.read(); // Humidity lsb
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data[2] = Wire.read(); // Temp msb
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data[3] = Wire.read(); // Temp lsb
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} else { return false; }
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// uint8_t status = data[0] >> 6; // 0 = Valid data, 1 = Stale data, 2 = Command mode, 3 = Not used
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Hih6.humidity = ConvertHumidity(((float)(((data[0] & 0x3F) << 8) | data[1]) * 100.0f) / 16383.0f);
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// Convert the data to 14-bits
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int temp = ((data[2] << 8) | (data[3] & 0xFC)) / 4;
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Hih6.temperature = ConvertTemp(((float)temp / 16384.0f) * 165.0f - 40.0f);
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Hih6.valid = SENSOR_MAX_MISS;
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return true;
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}
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/********************************************************************************************/
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void Hih6Detect(void)
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{
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if (!I2cSetDevice(HIH6_ADDR)) { return; }
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if (TasmotaGlobal.uptime < 2) { delay(20); } // Skip entering power on comand mode
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Hih6.type = Hih6Read();
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if (Hih6.type) {
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I2cSetActiveFound(HIH6_ADDR, Hih6.types);
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}
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}
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void Hih6EverySecond(void)
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{
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if (TasmotaGlobal.uptime &1) {
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// HIH6130: 30mS
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if (!Hih6Read()) {
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AddLogMissed(Hih6.types, Hih6.valid);
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}
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}
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}
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void Hih6Show(bool json)
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{
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if (Hih6.valid) {
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TempHumDewShow(json, (0 == TasmotaGlobal.tele_period), Hih6.types, Hih6.temperature, Hih6.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 Xsns55(uint8_t function)
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{
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if (!I2cEnabled(XI2C_36)) { return false; }
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bool result = false;
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if (FUNC_INIT == function) {
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Hih6Detect();
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}
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else if (Hih6.type) {
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switch (function) {
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case FUNC_EVERY_SECOND:
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Hih6EverySecond();
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break;
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case FUNC_JSON_APPEND:
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Hih6Show(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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Hih6Show(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_HIH6
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#endif // USE_I2C
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