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

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}; //Sesuaikan PIN pada Keypad-ESP32
byte colPins[KOLOM] = {5, 4, 2, 15}; //Sesuaikan PIN pada Keypad-ESP32
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, BARIS, KOLOM);

char customKey;         //Variabel penampung input keypad
int number = 0;         //Variabel penampung nilai angka
int password = 1379;    //Password

void setup() 
{
  lcd.init();                      
  lcd.backlight();
  //lcd.setBacklight(HIGH);
}

void loop() 
{
  lcd.setCursor(0,0);
  lcd.print("Input Password");      //Tampilan pada layar LCD
  
  customKey = keypad.getKey();    //Baca input keypad

  //------------Prosedur jika input berupa angka------------//
  switch(customKey){
    case '0' ... '9':
      lcd.setCursor(0,1);
      number = number * 10 + (customKey - '0');
      lcd.print(number);
    break;

    //------------Jika input '#' maka cek password------------//
    case '#':
      if(number == password){           //Jika password benar, maka
        lcd.setCursor(0,1);
        lcd.print("Access Accepted ");  //Tampilan LCD
        number = 0;
        lcd.clear(); 
      }
      else{                             //Jika salah, maka
        lcd.setCursor(0,1);
        lcd.print("Invalid Password");  //Tampilan LCD
        delay(2000);
        number = 0;
        lcd.clear();
      }
    break;

    //------------Jika input '*' maka hapus tampilan------------//
    case '*':
      number = 0;
      lcd.clear();
    break;
  }
}





// #include <Keypad.h>                 //Library keypad
// #include <LiquidCrystal_I2C.h>    //Library LCD I2C
// LiquidCrystal_I2C lcd(0x27,16,2);   //Alamat I2C

// const byte ROWS = 4;    //Jumlah baris keypad
// const byte COLS = 4;    //Jumlah kolom keypad

// char Keys[ROWS][COLS] = {   //Membuat array keypad
//   {'1','2','3','A'},
//   {'4','5','6','B'},
//   {'7','8','9','C'},
//   {'*','0','#','D'}
// };

// byte rowPins[ROWS] = { 14, 12, 19, 18 }; 
// byte colPins[COLS] = { 5, 4, 2, 15 };

// Keypad customKeypad = Keypad( makeKeymap(Keys), rowPins, colPins, ROWS, COLS);    //Masukkan info keypad pada library


// char customKey;         //Variabel penampung input keypad
// int number = 0;         //Variabel penampung nilai angka
// int password = 1379;    //Password

// void setup() {
//   lcd.init ();              //Mulai LCD
//   lcd.setBacklight(HIGH);   //Nyalakan backlight
// }

// void loop() {
//   lcd.setCursor(0,0);
//   lcd.print("Input Password");      //Tampilan pada layar LCD
  
//   customKey = customKeypad.getKey();    //Baca input keypad

//   //------------Prosedur jika input berupa angka------------//
//   switch(customKey){
//     case '0' ... '9':
//       lcd.setCursor(0,1);
//       number = number * 10 + (customKey - '0');
//       lcd.print(number);
//     break;

//     //------------Jika input '#' maka cek password------------//
//     case '#':
//       if(number == password){           //Jika password benar, maka
//         lcd.setCursor(0,1);
//         lcd.print("Access Accepted ");  //Tampilan LCD
//         number = 0;
//         lcd.clear(); 
//       }
//       else{                             //Jika salah, maka
//         lcd.setCursor(0,1);
//         lcd.print("Invalid Password");  //Tampilan LCD
//         delay(2000);
//         number = 0;
//         lcd.clear();
//       }
//     break;

//     //------------Jika input '*' maka hapus tampilan------------//
//     case '*':
//       number = 0;
//       lcd.clear();
//     break;
//   }
// }/* Program Kunci Pintu dengan password input Keypad 4x4 dibuat oleh Indobot */