Tasmota/tasmota/xsns_19_mgs.ino

122 lines
3.8 KiB
C++

/*
xsns_19_mgs.ino - Xadow and Grove Mutichannel Gas sensor support for Tasmota
Copyright (C) 2020 Palich2000 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_MGS
/*********************************************************************************************\
* Grove - Multichannel Gas Sensor
* http://wiki.seeed.cc/Grove-Multichannel_Gas_Sensor/
*
* https://github.com/Seeed-Studio/Mutichannel_Gas_Sensor.git
\*********************************************************************************************/
#define XSNS_19 19
#define XI2C_17 17 // See I2CDEVICES.md
#ifndef MGS_SENSOR_ADDR
#define MGS_SENSOR_ADDR 0x04 // Default Mutichannel Gas sensor i2c address
#endif
#include "MutichannelGasSensor.h"
bool mgs_detected = false;
void MGSInit(void) {
gas.begin(MGS_SENSOR_ADDR);
}
void MGSPrepare(void)
{
if (I2cActive(MGS_SENSOR_ADDR)) { return; }
gas.begin(MGS_SENSOR_ADDR);
if (!gas.isError()) {
I2cSetActiveFound(MGS_SENSOR_ADDR, "MultiGas");
mgs_detected = true;
}
}
char* measure_gas(int gas_type, char* buffer)
{
float f = gas.calcGas(gas_type);
dtostrfd(f, 2, buffer);
return buffer;
}
#ifdef USE_WEBSERVER
const char HTTP_MGS_GAS[] PROGMEM = "{s}MGS %s{m}%s " D_UNIT_PARTS_PER_MILLION "{e}"; // {s} = <tr><th>, {m} = </th><td>, {e} = </td></tr>
#endif // USE_WEBSERVER
void MGSShow(bool json)
{
char buffer[33];
if (json) {
ResponseAppend_P(PSTR(",\"MGS\":{\"NH3\":%s"), measure_gas(NH3, buffer));
ResponseAppend_P(PSTR(",\"CO\":%s"), measure_gas(CO, buffer));
ResponseAppend_P(PSTR(",\"NO2\":%s"), measure_gas(NO2, buffer));
ResponseAppend_P(PSTR(",\"C3H8\":%s"), measure_gas(C3H8, buffer));
ResponseAppend_P(PSTR(",\"C4H10\":%s"), measure_gas(C4H10, buffer));
ResponseAppend_P(PSTR(",\"CH4\":%s"), measure_gas(GAS_CH4, buffer));
ResponseAppend_P(PSTR(",\"H2\":%s"), measure_gas(H2, buffer));
ResponseAppend_P(PSTR(",\"C2H5OH\":%s}"), measure_gas(C2H5OH, buffer));
#ifdef USE_WEBSERVER
} else {
WSContentSend_PD(HTTP_MGS_GAS, "NH3", measure_gas(NH3, buffer));
WSContentSend_PD(HTTP_MGS_GAS, "CO", measure_gas(CO, buffer));
WSContentSend_PD(HTTP_MGS_GAS, "NO2", measure_gas(NO2, buffer));
WSContentSend_PD(HTTP_MGS_GAS, "C3H8", measure_gas(C3H8, buffer));
WSContentSend_PD(HTTP_MGS_GAS, "C4H10", measure_gas(C4H10, buffer));
WSContentSend_PD(HTTP_MGS_GAS, "CH4", measure_gas(GAS_CH4, buffer));
WSContentSend_PD(HTTP_MGS_GAS, "H2", measure_gas(H2, buffer));
WSContentSend_PD(HTTP_MGS_GAS, "C2H5OH", measure_gas(C2H5OH, buffer));
#endif // USE_WEBSERVER
}
}
/*********************************************************************************************\
* Interface
\*********************************************************************************************/
bool Xsns19(uint8_t function)
{
if (!I2cEnabled(XI2C_17)) { return false; }
bool result = false;
if (FUNC_INIT == function) {
MGSPrepare();
}
else if (mgs_detected) {
switch (function) {
case FUNC_JSON_APPEND:
MGSShow(1);
break;
#ifdef USE_WEBSERVER
case FUNC_WEB_SENSOR:
MGSShow(0);
break;
#endif // USE_WEBSERVER
}
}
return result;
}
#endif // USE_MGS
#endif // USE_I2C