test_dust_sensor.ino

/*
 * Sharp Optical Dust Sensor GP2Y1014AU0F
 * By Steven Wang @simplycodebased.org
 * 7/9/2019
*/

int measurePin = A5;
int ledPower = 12;

unsigned int samplingTime = 280;
unsigned int deltaTime = 40;
unsigned int sleepTime = 9680;

float voMeasured = 0;
float calcVoltage = 0;
float dustDensity = 0;

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

void loop(){
  digitalWrite(ledPower,LOW);
  delayMicroseconds(samplingTime);

  voMeasured = analogRead(measurePin);

  delayMicroseconds(deltaTime);
  digitalWrite(ledPower,HIGH);
  delayMicroseconds(sleepTime);

  calcVoltage = voMeasured*(5.0/1024);
  dustDensity = 0.17*calcVoltage-0.1;

  if ( dustDensity < 0)
  {
    dustDensity = 0.00;
  }

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

  Serial.println("Voltage:");
  Serial.println(calcVoltage);

  Serial.println("Dust Density:");
  Serial.println(dustDensity);

  delay(1000);
}