#include <Servo.h>
#include <DHT.h>
#include <LiquidCrystal_I2C.h>

// Setup for DHT sensor
#define DHTPIN 2
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

// Setup for LCD
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Setup for servo motor
Servo servo;

void setup() {
  // Initialize DHT sensor
  dht.begin();
  
  // Initialize LCD
  lcd.init();
  lcd.backlight();
  
  // Initialize servo
  servo.attach(9);

  // Setup pin modes
  pinMode(13, OUTPUT); // Pin for the status LED
  pinMode(2, INPUT);   // Pin for the infrared sensor

  // Start serial communication
  Serial.begin(9600);
}

void loop() {
  // Reading from the DHT sensor
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();
  
  // Displaying temperature and humidity on the LCD
  lcd.setCursor(0, 0);
  lcd.print("Humidity: ");
  lcd.print(humidity, 1);
  lcd.print(" %");

  lcd.setCursor(0, 1);
  lcd.print("Temp: ");
  lcd.print(temperature, 1);
  lcd.print(" Cel");

  // Reading from the infrared sensor
  int infraredState = digitalRead(2);

  // Logic for the infrared sensor and servo motor
  if (infraredState == HIGH) {
    digitalWrite(13, HIGH); // Turn on the LED
    Serial.println("Presence: Yes"); // Presence detected
    servo.write(90); // Move servo to 90 degrees
  } else {
    digitalWrite(13, LOW); // Turn off the LED
    Serial.println("Presence: No"); // No presence detected
    servo.write(0); // Return servo to 0 degrees
  }

  // Delay before the next reading
  delay(10000); // 10 seconds delay
}