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