Page 484 - MDP2020-1

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float voMeasured= 0.0;
float calcVolatage = 0.0;
float dustDensity = 0.0;

void setup(){
Serial.begin(9600);
pinMode(ledPower,OUTPUT);

}

void loop(){
digitalWrite(ledPower, LOW); //power on the LED
delayMicroseconds(samplingTime);

vo Measured = analogRead(measurePin);// read the dust value

delayMicroseconds(deltaTime);
digitalWrite(ledPower,HIGH); // turn the LED off

delayMicroseconds(sleepTime);

// 0~5 V mapped to 0~1023 integer values
// recover voltage
calcVoltage = voMeasured * (5.0/1024.0);

dustDensity = 0.17 * calcVoltage - 0.1;

Serial.print("Raw Signal Value (0-1023): ");
Serial.print(voMeasured);

Serial.print(" - Voltage : ");
Serial.print(calcVoltage);

Serial.print(" - Dust desity: : ");
Serial.print(dustDensity);

delay(1000);
}