#include <LiquidCrystal_I2C.h>
#include <Keypad.h>  
LiquidCrystal_I2C lcd(0x27,16,2);

const byte Baris = 4;
const byte Kolom = 4;

 char keys[Baris][Kolom] = {
   {'1','2','3','A'},
   {'4','5','6','B'},
   {'7','8','9','C'},
   {'*','0','#','D'}
 };

 byte rowPins[Baris] = {14, 12, 19, 18};
 byte colPins[Kolom] = {5, 4, 2, 15};
 Keypad customkeypad = Keypad( makeKeymap(keys), rowPins, colPins, Baris, Kolom);

 char customkey; 
 int number = 0;
 int password = 13102005;

void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  
}

void loop() {
  
  lcd.setCursor(1,0);
  lcd.print("Input Password");

  customkey = customkeypad.getKey();

  switch(customkey){
  case '0' ... '9':
    lcd.setCursor(0,1);
    number = number * 10 + (customkey - '0');
    lcd.print(number);
    break;



  case '#':
    if(number == password){
      lcd.setCursor(0,1);
      lcd.print("Access Guaranted");
      delay(2000);
      number = 0;
      lcd.clear();
    }
    else{
      lcd.setCursor(0,1);
      lcd.print("Invalid Password");
      delay(2000);
      number = 0;
      lcd.clear();
    }
  break;



  case '*':
    number = 0;
    lcd.clear();
  break;

  }
}