// Define the pins
const int LDRPin = 36; // LDR connected to A0
const int PIRPin = 2;     // PIR sensor connected to D2
const int RelayPin =3;   // Relay module connected to D3

// Threshold values
int lightThreshold = 500; // Adjust this based on your environment
int pirState = LOW;     // Start with no motion detected

void setup() {
  pinMode(RelayPin, OUTPUT);
  pinMode(PIRPin, INPUT);
  Serial.begin(9600);     // For debugging
}

void loop() {
  int lightLevel = analogRead(LDRPin);
  int motionDetected = digitalRead(PIRPin);

  Serial.print("Light Level: ");
  Serial.println(lightLevel);

  if (lightLevel < lightThreshold) { // If it's dark
    if (motionDetected == HIGH) {    // And motion is detected
      digitalWrite(RelayPin, HIGH);  // Turn on the light
      pirState = HIGH;
    }
  } else {                            // If it's bright
    digitalWrite(RelayPin, LOW);      // Turn off the light
    pirState = LOW;
  }

  delay(1000); // Wait 1 second before next loop
}