mirror of https://github.com/arendst/Tasmota.git
113 lines
3.5 KiB
C++
113 lines
3.5 KiB
C++
/*
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xsns_21_sgp30.ino - SGP30 gas and air quality sensor support for Sonoff-Tasmota
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Copyright (C) 2019 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_SGP30
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/*********************************************************************************************\
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* SGP30 - Gas (TVOC - Total Volatile Organic Compounds) and Air Quality (CO2)
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*
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* Source: Gerhard Mutz and Adafruit Industries
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*
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* I2C Address: 0x58
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\*********************************************************************************************/
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#define XSNS_21 21
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#include "Adafruit_SGP30.h"
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Adafruit_SGP30 sgp;
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uint8_t sgp30_type = 0;
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uint8_t sgp30_ready = 0;
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uint8_t sgp30_counter = 0;
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/********************************************************************************************/
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void Sgp30Update(void) // Perform every second to ensure proper operation of the baseline compensation algorithm
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{
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sgp30_ready = 0;
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if (!sgp30_type) {
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if (sgp.begin()) {
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sgp30_type = 1;
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// AddLog_P2(LOG_LEVEL_DEBUG, PSTR("SGP: Serialnumber 0x%04X-0x%04X-0x%04X"), sgp.serialnumber[0], sgp.serialnumber[1], sgp.serialnumber[2]);
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AddLog_P2(LOG_LEVEL_DEBUG, S_LOG_I2C_FOUND_AT, "SGP30", 0x58);
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}
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} else {
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if (!sgp.IAQmeasure()) return; // Measurement failed
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sgp30_counter++;
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if (30 == sgp30_counter) {
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sgp30_counter = 0;
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uint16_t TVOC_base;
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uint16_t eCO2_base;
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if (!sgp.getIAQBaseline(&eCO2_base, &TVOC_base)) return; // Failed to get baseline readings
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// AddLog_P2(LOG_LEVEL_DEBUG, PSTR("SGP: Baseline values eCO2 0x%04X, TVOC 0x%04X"), eCO2_base, TVOC_base);
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}
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sgp30_ready = 1;
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}
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}
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const char HTTP_SNS_SGP30[] PROGMEM = "%s"
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"{s}SGP30 " D_ECO2 "{m}%d " D_UNIT_PARTS_PER_MILLION "{e}" // {s} = <tr><th>, {m} = </th><td>, {e} = </td></tr>
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"{s}SGP30 " D_TVOC "{m}%d " D_UNIT_PARTS_PER_BILLION "{e}";
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void Sgp30Show(bool json)
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{
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if (sgp30_ready) {
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if (json) {
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snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("%s,\"SGP30\":{\"" D_JSON_ECO2 "\":%d,\"" D_JSON_TVOC "\":%d}"), mqtt_data, sgp.eCO2, sgp.TVOC);
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#ifdef USE_DOMOTICZ
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if (0 == tele_period) DomoticzSensor(DZ_AIRQUALITY, sgp.eCO2);
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#endif // USE_DOMOTICZ
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#ifdef USE_WEBSERVER
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} else {
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snprintf_P(mqtt_data, sizeof(mqtt_data), HTTP_SNS_SGP30, mqtt_data, sgp.eCO2, sgp.TVOC);
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#endif
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}
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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 Xsns21(uint8_t function)
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{
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bool result = false;
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if (i2c_flg) {
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switch (function) {
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case FUNC_EVERY_SECOND:
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Sgp30Update();
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break;
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case FUNC_JSON_APPEND:
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Sgp30Show(1);
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break;
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#ifdef USE_WEBSERVER
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case FUNC_WEB_APPEND:
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Sgp30Show(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_SGP30
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#endif // USE_I2C
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