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

#define DHTPIN 6
#define DHTTYPE DHT22
#define PIRPIN 7
#define LEDPIN 2
#define BUZZERPIN 5
#define RELAYPIN 4
#define SERVOPIN 3

DHT dht(DHTPIN, DHTTYPE);
Servo myServo;
LiquidCrystal_I2C lcd(0x27, 16, 2);

bool motionDetected = false;

void setup() {
  pinMode(PIRPIN, INPUT);
  pinMode(LEDPIN, OUTPUT);
  pinMode(BUZZERPIN, OUTPUT);
  pinMode(RELAYPIN, OUTPUT);
  
  myServo.attach(SERVOPIN);
  myServo.write(0); // initial position

  //lcd.begin();
  lcd.init();
  lcd.backlight();
  dht.begin();

  lcd.setCursor(0, 0);
  lcd.print("System Starting...");
  delay(2000);
  lcd.clear();
}

void loop() {
  motionDetected = digitalRead(PIRPIN);

  float temp = dht.readTemperature();
  float hum = dht.readHumidity();

  lcd.clear();
  if (motionDetected) {
    digitalWrite(LEDPIN, HIGH);
    digitalWrite(BUZZERPIN, HIGH);
    digitalWrite(RELAYPIN, HIGH);
    myServo.write(90);  // Move servo to 90°
    lcd.setCursor(0, 0);
    lcd.print("Motion Detected");

    delay(500); // buzzer duration
    digitalWrite(BUZZERPIN, LOW);

    lcd.setCursor(0, 1);
    lcd.print("T:");
    lcd.print(temp);
    lcd.print("C H:");
    lcd.print(hum);
    lcd.print("%");

    delay(2000);
  } else {
    digitalWrite(LEDPIN, LOW);
    digitalWrite(RELAYPIN, LOW);
    myServo.write(0);  // Servo back to 0°
    lcd.setCursor(0, 0);
    lcd.print("No Motion");
    lcd.setCursor(0, 1);
    lcd.print("T:");
    lcd.print(temp);
    lcd.print("C H:");
    lcd.print(hum);
    lcd.print("%");
    delay(2000);
  }
}