mirror of https://github.com/arendst/Tasmota.git
143 lines
3.3 KiB
C++
143 lines
3.3 KiB
C++
/*
|
|
xsns_46_MLX90614.ino - Support for MLX ir temperature sensor
|
|
|
|
Copyright (C) 2019 Gerhard Mutz and Theo Arends
|
|
|
|
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_MLX90614
|
|
|
|
#define XSNS_46 46
|
|
#define XI2C_32 32 // See I2CDEVICES.md
|
|
|
|
#define I2_ADR_IRT 0x5a
|
|
|
|
#define MLX90614_RAWIR1 0x04
|
|
#define MLX90614_RAWIR2 0x05
|
|
#define MLX90614_TA 0x06
|
|
#define MLX90614_TOBJ1 0x07
|
|
#define MLX90614_TOBJ2 0x08
|
|
|
|
bool mlx_ready = false;
|
|
float obj_temp;
|
|
float amb_temp;
|
|
|
|
void MLX90614_Init(void)
|
|
{
|
|
if (!I2cSetDevice(I2_ADR_IRT)) { return; }
|
|
|
|
I2cSetActiveFound(I2_ADR_IRT, "MLX90614");
|
|
mlx_ready = true;
|
|
|
|
// not needed on tasmota
|
|
//Wire.begin();
|
|
//delay(500);
|
|
}
|
|
|
|
// return ir temp
|
|
// 0 = chip, 1 = object temperature
|
|
// * 0.02 - 273.15
|
|
uint16_t read_irtmp(uint8_t flag)
|
|
{
|
|
Wire.beginTransmission(I2_ADR_IRT);
|
|
if (!flag) {
|
|
Wire.write(MLX90614_TA);
|
|
} else {
|
|
Wire.write(MLX90614_TOBJ1);
|
|
}
|
|
Wire.endTransmission(false);
|
|
|
|
Wire.requestFrom(I2_ADR_IRT, 3);
|
|
uint8_t low = Wire.read();
|
|
uint8_t hig = Wire.read();
|
|
Wire.read();
|
|
|
|
uint16_t val = ((uint16_t)hig << 8) | low;
|
|
return val;
|
|
}
|
|
|
|
void MLX90614_Every_Second(void)
|
|
{
|
|
uint16_t uval = read_irtmp(1);
|
|
if (uval & 0x8000) {
|
|
obj_temp = -999;
|
|
} else {
|
|
obj_temp = ((float)uval * 0.02) - 273.15;
|
|
}
|
|
uval = read_irtmp(0);
|
|
if (uval & 0x8000) {
|
|
amb_temp = -999;
|
|
} else {
|
|
amb_temp = ((float)uval * 0.02) - 273.15;
|
|
}
|
|
}
|
|
|
|
#ifdef USE_WEBSERVER
|
|
const char HTTP_IRTMP[] PROGMEM =
|
|
"{s}MXL90614 " "OBJ-" D_TEMPERATURE "{m}%s C" "{e}"
|
|
"{s}MXL90614 " "AMB-" D_TEMPERATURE "{m}%s C" "{e}";
|
|
#endif // USE_WEBSERVER
|
|
|
|
void MLX90614_Show(uint8_t json)
|
|
{
|
|
char obj_tstr[16];
|
|
dtostrfd(obj_temp, Settings.flag2.temperature_resolution, obj_tstr);
|
|
char amb_tstr[16];
|
|
dtostrfd(amb_temp, Settings.flag2.temperature_resolution, amb_tstr);
|
|
|
|
if (json) {
|
|
ResponseAppend_P(PSTR(",\"MLX90614\":{\"OBJTMP\":%s,\"AMBTMP\":%s}"), obj_tstr, amb_tstr);
|
|
#ifdef USE_WEBSERVER
|
|
} else {
|
|
WSContentSend_PD(HTTP_IRTMP, obj_tstr, amb_tstr);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/*********************************************************************************************\
|
|
* Interface
|
|
\*********************************************************************************************/
|
|
|
|
bool Xsns46(byte function)
|
|
{
|
|
if (!I2cEnabled(XI2C_32)) { return false; }
|
|
|
|
bool result = false;
|
|
|
|
if (FUNC_INIT == function) {
|
|
MLX90614_Init();
|
|
}
|
|
else if (mlx_ready) {
|
|
switch (function) {
|
|
case FUNC_EVERY_SECOND:
|
|
MLX90614_Every_Second();
|
|
break;
|
|
case FUNC_JSON_APPEND:
|
|
MLX90614_Show(1);
|
|
break;
|
|
#ifdef USE_WEBSERVER
|
|
case FUNC_WEB_SENSOR:
|
|
MLX90614_Show(0);
|
|
break;
|
|
#endif // USE_WEBSERVER
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
#endif // USE_MLX90614
|
|
#endif // USE_I2C
|