pinMode(RELAY_PIN, OUTPUT);
  pinMode(LED_PIN, OUTPUT);

  // Start DHT sensor
  dht.begin();

  // Initialize states
  digitalWrite(RELAY_PIN, LOW); // Relay OFF initially
  digitalWrite(LED_PIN, LOW);   // LED OFF initially

  Serial.println("System Initialized");
}

void loop() {
  // Read PIR sensor
  int motion = digitalRead(PIR_PIN);
  
  // Read DHT22 data
  float temp = dht.readTemperature();
  float humidity = dht.readHumidity();

  // Display DHT22 values
  if (!isnan(temp) && !isnan(humidity)) {
    Serial.print("Temperature: ");
    Serial.print(temp);
    Serial.print(" C, Humidity: ");
    Serial.print(humidity);
    Serial.println(" %");
  } else {
    Serial.println("Failed to read from DHT sensor!");
  }

  // If motion detected, turn on relay and LED
  if (motion == HIGH) {
    Serial.println("Motion detected!");
    digitalWrite(RELAY_PIN, HIGH); // Turn ON relay
    digitalWrite(LED_PIN, HIGH);   // Turn ON LED
    delay(3000);                  // Keep it ON for 3 seconds
  } else {
    digitalWrite(RELAY_PIN, LOW);  // Turn OFF relay
    digitalWrite(LED_PIN, LOW);    // Turn OFF LED
  }

  delay(1000); // Delay to avoid false readings
}