#include <ESP32Servo.h>
#include <LiquidCrystal_I2C.h>

#define SERVO_PIN 5 // Replace with the GPIO pin connected to the servo
#define PIR_PIN 25 

bool doorLocked = true;     // Initial door locked state
bool motionDetected = false;

Servo doorLock;  // Create a servo object

LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  doorLock.attach(SERVO_PIN); // Attach the servo to the specified pin
  pinMode(PIR_PIN, INPUT); 
  doorLock.write(0);

  LCD.init();
  LCD.backlight();
  LCD.setCursor(0, 0);
  LCD.print("Motion Detector");
}

void loop() {
  motionDetected = digitalRead(PIR_PIN); // Check for motion
  if (motionDetected) {
    if (doorLocked) {
      unlockDoor();
    } else {
      lockDoor();
    }
    delay(1000); // Delay to avoid continuous detection
  }

}


void unlockDoor() {
  doorLocked = false;
  LCD.clear();
  LCD.setCursor(0, 0);
  LCD.print("Motion Detected");
  LCD.setCursor(0, 1);
  LCD.print("Door Unlocked");
  doorLock.write(90);           // Unlock the door (servo movement)
  delay(5000);                  // Door remains unlocked for 5 seconds
  doorLocked = true;
  lockDoor();
}

void lockDoor() {
  doorLock.write(0);            // Lock the door (servo movement)
  LCD.clear();
  LCD.setCursor(0, 0);
  LCD.print("Door Locked");
}