/* Read the photo sensor on EduBase V2.
 * On EduBase V2, the photo sensor is connected to pin A0. 
 * The conversion result is sent to the Serial monitor. 
 * Cover the photo sensor or shine a flashlight on it and see the value changes. */

// Pin A0 is connected to a photo sensor
const int photo = A0;

void setup() {
    Serial.begin(9600);
    Serial.println("Photosensor:");
}
void loop() {
    /* read the voltage from ADC */
    int photoValue = analogRead(photo);
   
    /* write it to the Serial monitor */
    Serial.print("  Photosensor value = ");
    Serial.println(photoValue, DEC);
}