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

#define SERVO_PIN 14 
#define PIR_PIN 25 
  
bool motionDetected = false;
bool doorLocked = true;  

Servo doorLock;

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


void setup() {
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  pinMode(PIR_PIN, INPUT); 

  doorLock.attach(SERVO_PIN);
  doorLock.write(0);

 
  LCD.init();
  LCD.backlight();
  LCD.setCursor(0, 0);
  LCD.print("Smart Door Lock");
}

void loop() {
  motionDetected = digitalRead(PIR_PIN);
  if (motionDetected) {
      if(doorLocked){
         unlockDoor();
      }else{
        lockDoor();
      }  
  }
 delay(200);
}



// Identify and fix the bug as to why the door is not getting locked again.
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);
  delay(5000);
  doorLocked = true;
  lockDoor();
}

// Display the appropriate message after door locked
void lockDoor() {
  doorLock.write(0);
  LCD.clear();
  LCD.setCursor(0, 0);
  LCD.print("Door Locked");
}