const int LDRPin = A0;    // LDR connected to analog pin A0
const int RelayPin = 2;   // Relay control pin connected to digital pin 2

void setup() {
  pinMode(RelayPin, OUTPUT); // Set relay pin as output
  Serial.begin(9600); // Initialize serial communication
}

void loop() {
  int ldrValue = analogRead(LDRPin); // Read LDR value
  Serial.print("LDR Value: ");
  Serial.println(ldrValue);

  // Adjust the threshold value according to your requirement
  int threshold = 500; // Example threshold value
  if (ldrValue < threshold) {
    digitalWrite(RelayPin, HIGH); // Turn on relay if light intensity is low
  } else {
    digitalWrite(RelayPin, LOW); // Turn off relay if light intensity is high
  }
  
  delay(1000); // Delay for stability
}