66 lines
1.7 KiB
C++
66 lines
1.7 KiB
C++
//Connect SCL to D1, SDA to D2, GND and 3v3
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#include "sensor_bh1750.h"
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Sensor_BH1750::Sensor_BH1750()
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{
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bh1750 = new BH1750(0x23); //0x23 if addr connected to ground (=pin open), 0x5c if addr pulled high
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}
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void Sensor_BH1750::init() //Things to be done during setup()
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{
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Serial.println("initializing bh1750");
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Wire.begin();
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if (bh1750->begin(BH1750::CONTINUOUS_HIGH_RES_MODE)) {
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Serial.println(F("BH1750 Advanced begin"));
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init_ok=true;
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} else {
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Serial.println(F("Error initialising BH1750"));
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}
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bh1750->readLightLevel(); //make first reading, could be 0
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}
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//Also called during setup()
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void Sensor_BH1750::setSettings(float minchange, unsigned long senddelaymax, unsigned long readdelay)
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{
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data.minchange=minchange;
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data.senddelaymax=senddelaymax;
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data.readdelay=readdelay;
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}
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//Called during setup
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void Sensor_BH1750::advertise(HomieNode& p_sensorNode)
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{
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sensorNode = &p_sensorNode;
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sensorNode->advertise("light");
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}
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void Sensor_BH1750::sensorloop()
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{
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if (init_ok) {
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sensordata &d=data;
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bool _changed=false;
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if (millis() >= (d.lastreadtime+d.readdelay)) {
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d.value = bh1750->readLightLevel(); // [lux]
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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 BH1750. reason=");
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if (_changed) Serial.println("change"); else Serial.println("time");
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Homie.getLogger() << "light " << ": " << d.value << endl;
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sensorNode->setProperty("light").send(String(d.value));
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d.lastsentvalue=d.value;
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d.lastsent=millis();
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}
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}
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}
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