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

int servoPin=11;
int buttonPin=10;
int LOCK=90;
int UNLOCK=180;
int servoPos=0;

int buttonState = HIGH;
int lastButtonState = HIGH;
unsigned long lastDebounceTime = 0;
unsigned long debounceDelay = 50;

Servo myservo;

LiquidCrystal_I2C lcd(0x27,16,2);

void setup(){
  myservo.attach(servoPin);
  pinMode(buttonPin, INPUT);
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0,0);
  lcd.print("Welcome !");
  delay(5000);
  /*lcd.setCursor(0,0);
  lcd.print("Please enter");
  lcd.setCursor(0,1);
  lcd.print("password");*/
}


void loop() {
  int reading = digitalRead(buttonPin);

  if (reading != lastButtonState) {
    lastDebounceTime = millis();
  }

  if ((millis() - lastDebounceTime) > debounceDelay) {
    if (reading != buttonState) {
      buttonState = reading;

      if (buttonState == LOW) {
        if (servoPos == LOCK) {
          myservo.write(UNLOCK);
          servoPos = UNLOCK;
          lcd.clear();
          lcd.print("Door Unlocked!");
        } else if (servoPos == UNLOCK || servoPos == 0) {
          myservo.write(LOCK);
          servoPos = LOCK;
          lcd.clear();
          lcd.print("Door Locked!");
        }
      }
    }
  }

  lastButtonState = reading;
}