133 lines
3.8 KiB
C++
133 lines
3.8 KiB
C++
#ifdef SENSOR_SHT31
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//Connect SCL to D1, SDA to D2, GND and 3v3
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#include "sensor_sht31.h"
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Sensor_SHT31::Sensor_SHT31()
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{
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sht31 = new Adafruit_SHT31();
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}
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void Sensor_SHT31::init() //Things to be done during setup()
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{
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Serial.println("initializing sht31");
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if (!sht31->begin(0x44)){
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Serial.println("#ERROR: SHT31 init fail\n");
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}else{
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init_ok=true; //stays false if init failed, sensor will not be read in loop
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}
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}
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//Also called during setup()
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void Sensor_SHT31::setSettings_Temperature(float minchange, unsigned long senddelaymax, unsigned long readdelay)
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{
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data_temperature.minchange=minchange;
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data_temperature.senddelaymax=senddelaymax;
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data_temperature.readdelay=readdelay;
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}
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//Also called during setup()
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void Sensor_SHT31::setSettings_Humidity(float minchange, unsigned long senddelaymax, unsigned long readdelay)
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{
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data_humidity.minchange=minchange;
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data_humidity.senddelaymax=senddelaymax;
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data_humidity.readdelay=readdelay;
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}
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//Called during setup
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void Sensor_SHT31::advertise(HomieNode& p_sensorNode)
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{
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sensorNode = &p_sensorNode;
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sensorNode->advertise("temperature_sht");
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sensorNode->advertise("humidity_sht");
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sensorNode->advertise("sht_heater");
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}
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void Sensor_SHT31::sensorloop()
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{
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if (init_ok) {
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loop_SHT31_temperature();
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loop_SHT31_humidity();
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}
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}
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void Sensor_SHT31::loop_SHT31_temperature()
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{
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sensordata &d=data_temperature;
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bool _changed=false;
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if (millis() >= (d.lastreadtime+d.readdelay)) {
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d.value = sht31->readTemperature();
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if (fabs(d.lastsentvalue-d.value)>=d.minchange){
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_changed=true;
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}
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d.lastreadtime=millis();
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}
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if (_changed || millis() >= (d.lastsent+d.senddelaymax)) {
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Serial.print("Sending SHT31_temperature. reason=");
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if (_changed) Serial.println("change"); else Serial.println("time");
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if (!(isnan(d.value) == 1)){ //success
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sensorNode->setProperty("temperature_sht").send(String(d.value));
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Homie.getLogger() << "temperature_sht " << ": " << d.value << endl;
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d.lastsentvalue=d.value;
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}
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d.lastsent=millis();
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}
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}
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void Sensor_SHT31::loop_SHT31_humidity()
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{
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sensordata &d=data_humidity;
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bool _changed=false;
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if (millis() >= (d.lastreadtime+d.readdelay)) {
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d.value = sht31->readHumidity();
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checkHeater(d.value);
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if (fabs(d.lastsentvalue-d.value)>=d.minchange){
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_changed=true;
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}
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d.lastreadtime=millis();
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}
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if (_changed || millis() >= (d.lastsent+d.senddelaymax)) {
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Serial.print("Sending SHT31_humidity. reason=");
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if (_changed) Serial.println("change"); else Serial.println("time");
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if (!(isnan(d.value) == 1)){ //success
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Homie.getLogger() << "humidity_sht " << ": " << d.value << endl;
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sensorNode->setProperty("humidity_sht").send(String(d.value));
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d.lastsentvalue=d.value;
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}
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d.lastsent=millis();
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}
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}
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void Sensor_SHT31::checkHeater(float humidity) {
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bool heaterstatus=sht31->isHeaterEnabled();
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if (isnan(humidity)==1) { //if sensor cant be read. turn heater on to prevent condensation just in case
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sht31->heater(true);
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Serial.println("checkHeater humidity isnan. turned heater on");
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}else{
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if (!heaterstatus && humidity>=SHT31_HUMIDITY_HEATERON) {//heater was off and humidity is too high
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sht31->heater(true);
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Serial.println("checkHeater humidity too high. turned heater on");
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}else if(heaterstatus && humidity<=SHT31_HUMIDITY_HEATEROFF) { //heater was on and humidity is low enough
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sht31->heater(false);
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Serial.println("checkHeater humidity low enough. turned heater off");
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}
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}
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heaterstatus=sht31->isHeaterEnabled();
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if (heaterstatus!=last_sent_heaterstatus || millis()<30000) { //changed or just booted
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sensorNode->setProperty("sht_heater").send(String(heaterstatus));
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last_sent_heaterstatus=heaterstatus;
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}
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}
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#endif |