const int ldrAnalogPin = A0; // AO pin is connected to A0
const int ldrDigitalPin = 2; // DO pin to D2 (optional)
const int ledPin = 9;        // LED to D9

void setup() {
  Serial.begin(9600);         // Initialize serial monitor
  pinMode(ldrDigitalPin, INPUT); // Set DO as input (if using DO)
  pinMode(ledPin, OUTPUT);    // Set LED as output
}

void loop() {
  int lightValue = analogRead(ldrAnalogPin); // Read analog value of AO
  int lightThreshold = digitalRead(ldrDigitalPin); // Read digital state of DO

  // Output light intensity to serial monitor
  Serial.print("Analog Light Intensity: ");
  Serial.println(lightValue);

  // Use digital output to determine if below threshold
  if (lightThreshold == LOW) {
    Serial.println("Light is below the threshold!");
    digitalWrite(ledPin, HIGH); // Turn LED on when light is low
  } else {
    digitalWrite(ledPin, LOW); // Turn LED off when light is normal
  }

  delay(2000); // Read every 2 seconds
}