80 lines
2.2 KiB
C++
80 lines
2.2 KiB
C++
//ML8511 UV Sensor outputs an analog voltage. ML8511PIN needs to be an ADC pin
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//value as uvIntensity (mW/cm^2)
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#include "sensor_ml8511.h"
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Sensor_ML8511::Sensor_ML8511(int pin)
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{
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ml8511pin=pin;
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}
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void Sensor_ML8511::init() //Things to be done during setup()
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{
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Serial.println("initializing ml8511");
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pinMode(ml8511pin, INPUT);
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analogRead(ml8511pin); //first read adc. just to avoid problems
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init_ok=true;
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}
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//Also called during setup()
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void Sensor_ML8511::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_ML8511::advertise(HomieNode& p_sensorNode)
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{
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sensorNode = &p_sensorNode;
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sensorNode->advertise("uv");
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}
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void Sensor_ML8511::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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Serial.print("analogRead="); Serial.println(analogRead(ml8511pin));
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d.value = getUV_ML8511(ml8511pin); //uvIntensity (mW/cm^2)
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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 uv ML8511. reason=");
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if (_changed) Serial.println("change"); else Serial.println("time");
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Homie.getLogger() << "uv " << ": " << d.value << endl;
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sensorNode->setProperty("uv").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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float Sensor_ML8511::getUV_ML8511(int pin) {
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float uvadc=0;
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#define UVADCSAMPLES 32
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for (uint16_t _s=0;_s<UVADCSAMPLES;_s++) {
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uvadc += 3.06 / 1023 * analogRead(pin) ; //assumes 1023 = 3.069V (10-bit adc on esp8266)
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}
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uvadc=uvadc/UVADCSAMPLES; //average
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return max(mapfloat(uvadc, 0.99, 2.8, 0.0, 15.0), 0.0F); //uvIntensity (mW/cm^2)
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}
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//The Arduino Map function but for floats
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//From: http://forum.arduino.cc/index.php?topic=3922.0
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float Sensor_ML8511::mapfloat(float x, float in_min, float in_max, float out_min, float out_max)
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{
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return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
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} |