tcrt5000-arduino.ino

int ledPin = 13; // Arduino' inner led
int sigPin = 4; // For sensor signal
int value = 0; // Holds the returned value
 
void setup(){
  Serial.begin(9600);
  pinMode(ledPin, OUTPUT); // Arduino's led as output
  pinMode(sigPin, INPUT); // signal pin as input
}
 
void loop(){
  value = digitalRead(sigPin); // Read the sensor

  if (value == HIGH) { // iF HIGH, black area
    digitalWrite(ledPin, HIGH); // Turn on the LED
    Serial.write("Black"); // Write on console
  } else { // Else, white area
    digitalWrite(ledPin, LOW); // Turn off the LED
    Serial.write("White"); // Write on console
  }
}