#include <LiquidCrystal.h>
#include <Keypad.h> 
#define Buzzer 13
#define Led 11
char* password ="12345";
int posisi = 0;
const byte rows = 4; 
const byte cols = 4;
char keyMap [rows] [cols] = 
{ 
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};
byte rowPins [rows] = {2, 3, 4, 5};
byte colPins [cols] = {6, 7, 8, 9};
Keypad myKeypad = Keypad( makeKeymap(keyMap), rowPins, colPins, rows, cols);
LiquidCrystal lcd (A5, A4, A3, A2, A1, A0); // (RS,E,D4,D5,D6,D7)

void setup()
{
  lcd.begin(16, 2);
  pinMode(Buzzer, OUTPUT); 
  pinMode(Led, OUTPUT);
  setLocked (true); 
}

void loop()
{
  char whichKey = myKeypad.getKey(); 
  lcd.setCursor(4, 0);
  lcd.print("Silahkan");
  lcd.setCursor(0, 1);
  lcd.print(" Ketik Password");
  if(whichKey == '*' || whichKey == '#' || whichKey == 'A' ||
  whichKey == 'B' || whichKey == 'C' || whichKey == 'D' || whichKey == '0')
  {
    posisi=0;
    setLocked (true);
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print(" Password Salah");
    lcd.setCursor(0, 1);
    lcd.print("  Ulangi lagi");
    tone(Buzzer,2000,200);
    delay(1000);
    lcd.clear();
  }
  if(whichKey == password [posisi])
  {
    posisi ++;
  }
  if(posisi == 5)
  {
    setLocked (false);
    lcd.clear();
    lcd.setCursor(1, 0);
    lcd.print("*** SUKSES ***");
    delay(5000);
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("HAI .... Kenalin");
    lcd.setCursor(0, 1);
    lcd.print("  NAMAKU UDHIN");
    delay(5000);
    lcd.clear();
  }
  delay(100);
}

void setLocked(int locked)
{
  if(locked)
    {
    digitalWrite(Led, LOW);
    noTone(Buzzer);
    }
    else
    {
    digitalWrite(Led, HIGH);
    tone(Buzzer,1535,500);
    }
}