#include <DHT.h>
#include <Servo.h> // Include the Servo library

// Constants
#define DHTPIN 2       // Digital pin connected to the DHT22 sensor
#define DHTTYPE DHT22  // Type of DHT sensor

#define BUZZER_PIN 5   // Digital pin connected to the buzzer
#define LED_PIN 10     // Digital pin connected to the LED
#define SERVO_PIN 9    // Digital pin connected to the servo motor

// Initialize DHT sensor
DHT dht(DHTPIN, DHTTYPE);
Servo myservo; // Create a Servo object

void setup() {
  // Initialize serial communication
  Serial.begin(9600);

  // Initialize DHT sensor
  dht.begin();

  // Initialize buzzer, LED, and servo pins as outputs
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(LED_PIN, OUTPUT);
  myservo.attach(SERVO_PIN); // Attach the servo to the specified pin

  // Turn off the buzzer, LED, and set the initial servo position
  digitalWrite(BUZZER_PIN, LOW);
  digitalWrite(LED_PIN, LOW);
  myservo.write(90); // Set the initial servo position (90 degrees)
}

void loop() {
  // Read temperature and humidity from DHT sensor
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();

  // Check if the readings are valid
  if (!isnan(humidity) && !isnan(temperature)) {
    // Print temperature and humidity to the serial monitor
    Serial.print("Humidity: ");
    Serial.print(humidity);
    Serial.print("%  Temperature: ");
    Serial.print(temperature);
    Serial.println("°C");

    // Check if temperature is above a threshold
    if (temperature > 25.0) {
      // Turn on the LED
      digitalWrite(LED_PIN, HIGH);

      // Generate a tone on the buzzer
      tone(BUZZER_PIN, 1000); // You can adjust the frequency as needed

      // Move the servo to a specific position (e.g., 180 degrees)
      myservo.write(180); // Rotate the servo to 180 degrees

      delay(1000); // Delay for 1 second

      // Turn off the LED, stop the buzzer tone, and return the servo to the initial position
      digitalWrite(LED_PIN, LOW);
      noTone(BUZZER_PIN);
      myservo.write(90); // Return the servo to the initial position (90 degrees)
    }
  } else {
    // Print an error message if the sensor readings are invalid
    Serial.println("Error: Unable to read from DHT sensor.");
  }

  // Delay for a moment before taking the next reading
  delay(2000); // Delay for 2 seconds
}