const int LDRPin = 36;    // Analog pin connected to LDR
const int RelayPin = 23;   // Digital pin connected to Relay
int LDRValue = 0;          // Variable to store LDR reading

void setup() {
    Serial.begin(115200);   // Start serial communication
    pinMode(RelayPin, OUTPUT);   // Set Relay pin as output
}

void loop() {
    LDRValue = analogRead(LDRPin);   // Read light intensity
    Serial.print("LDR Value: ");   
    Serial.println(LDRValue);        // Print LDR reading

    if (LDRValue > 500) {
        digitalWrite(RelayPin, HIGH);   // Turn ON relay if it's dark
        Serial.println("Light ON");
    } else {
        digitalWrite(RelayPin, LOW);   // Turn OFF relay if it's bright
        Serial.println("Light OFF");
    }

    delay(500);     // Wait for 0.5 seconds
}