/**/
int OUT = 2; //pin 2 Arduino connected to the sensor output
 
void setup()
{
  Serial.begin(9600); //initiates serial monitor
  pinMode(OUT, INPUT); // setting pin 2 in Arduino as output
  Serial.println("Distance sensor test");
  Serial.println("");
}
 
void loop()
{
  
  Serial.print("Object detection: "); // display results on screen in a loop every 500 ms
  if(digitalRead(OUT) == 0) // low state means object detection
  {
    Serial.println("YES");//eye opened
  }
  if(digitalRead(OUT) == 1)
  {
    Serial.println("NO");//eye closed
  }
  delay(500);
}