#include <Keypad.h>
#include <LiquidCrystal_I2C.h>

#define led 13
#define buzzer 27

LiquidCrystal_I2C lcd(0x27, 16, 2);

const int BARIS = 4;
const int 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, ROWS, COLS);  //Masukkan info keypad pada library
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, BARIS, KOLOM);

char customKey;
int number = 0;
// String number = ""
int password = 21;
bool test = false;
void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.setBacklight(HIGH);
  pinMode(led, OUTPUT);
  pinMode(buzzer, OUTPUT);
}
void loop() {
  lcd.setCursor(0, 0);
  lcd.print("Input Password");
  
  customKey = keypad.getKey();

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

    case '#':
      if (number == password) {

        lcd.setCursor(0, 1);
        lcd.print("Access Granted");
        number = 0;
        digitalWrite(led,HIGH);
        delay(3000);
        digitalWrite(led,LOW);
        lcd.clear();
  

      } else {
        //Jika salah, maka
        lcd.setCursor(0, 1);
        lcd.print("Invalid Password");
        digitalWrite(buzzer, HIGH);
        delay(2000);
        digitalWrite(buzzer, LOW);
        number = 0;
        lcd.clear();

      }
      break;

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

// void loop() {
//   lcd.setCursor(0, 0);
//   lcd.print("Input Password");
  
//   customKey = keypad.getKey();
//   char key = keypad.getKey();
//   wa += String(key);
//   if (key != NO_KEY) {
//     Serial.println(key);
//     Serial.println(wa);
//   }
// }