#include <Servo.h>
#include <LiquidCrystal.h>
#include<Keypad.h>
Servo myservo;
const int servopin=2;
const int rows =4;
const int columns=4;
char keyss[rows][columns]={
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};
byte rowpins[rows]={10,9,8,7};
byte colpins[columns]={6,5,4,3};
const int buzzerpin=12;
Keypad keypad=Keypad(makeKeymap(keyss),rowpins,colpins,rows,columns);
LiquidCrystal_I2C lcd(0x27,16,2);
String password="1234";
String inputpassword="";
void setup() {
  myservo.attach(servopin);
  lcd.init();
  lcd.backlight();
  myservo.write(0);
  lcd.setcursor(0,0);
  lcd.print("enter password");
  pinMode(buzzerpin, INPUT);


  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:
  char key= Keypad.getkey();
  if (key)
  {
    if (key=="c")
    {
      if (Unlocked)
      {
        myservo.write(0);
        lcd.clear();
        lcd.setcursor(0,0);
        lcd.print("Locked");
        delay(500);
        lcd.clear();
        lcd.setcursor(0,0);
        lcd.print("eneter password");
      }
    }
    if(key=="*")
    {
      input password="";
      lcd.clear();
      lcd.setcursor(0,0);
      lcd.print("enter password");
    }
    if (key=="#")
    {
      if ( inputpassword== password)
      {
        myservo.write(90);
        lcd.clear();
        lcd.setcursor(0,0);
        lcd.print("Unlocked");
        lcd.print("ENTER C to lock");
      }
    }else
    {
      lcd.clear();
      lcd.setcursor(0,0)
      lcd.print("wrong password");
      tone(buzzerpin,1000);
      delay(500);
      lcd.clear();
      lcd.setcursor(0,0);
      lcd.print("enter password");
      notone(buzzerpin);
    }
  }inputpassword=""

}