#include <OneWire.h>
#include <DallasTemperature.h>
#include <Servo.h>
#include <LiquidCrystal_I2C.h>

#define ONE_WIRE_BUS 2  // Temperature sensor pin
#define PIR_SENSOR_PIN 3 // Motion sensor pin
#define LED_PIN 4        // LED pin
#define SERVO_PIN 5     

OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

Servo servo;
LiquidCrystal_I2C lcd(0x27, 16, 2); 

int tempThreshold =  35.8; // Temperature threshold in Celsius
bool isDoorOpen = false;

void setup() {
  sensors.begin();
  pinMode(PIR_SENSOR_PIN, INPUT);
  pinMode(LED_PIN, OUTPUT);
  pinMode(SERVO_PIN, OUTPUT);
  lcd.begin(16, 2);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temperature:");
}

void loop() {
  sensors.requestTemperatures();
  float temperature = sensors.getTempCByIndex(0);
  bool motionDetected = digitalRead(PIR_SENSOR_PIN) == HIGH;

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

  if (temperature < tempThreshold && !motionDetected) {
    digitalWrite(LED_PIN, HIGH);
    if (!isDoorOpen) {
      openDoor();
    }
  } else {
    digitalWrite(LED_PIN, LOW);
    if (isDoorOpen) {
      closeDoor();
    }
  }

  delay(1000); // Delay for a second (adjust as needed)
}

void openDoor() {
  servo.attach(SERVO_PIN);
  servo.write(90); // Adjust the angle to open the door
  delay(500);      // Wait for the servo to move
  servo.detach();
  isDoorOpen = true;
}

void closeDoor() {
  servo.attach(SERVO_PIN);
  servo.write(0); // Adjust the angle to close the door
  delay(500);     // Wait for the servo to move
  servo.detach();
  isDoorOpen = false;
}