#include <Keypad.h>

const byte ROWS = 4; //jumlah baris
const byte COLS = 4; //jumlah kolom

char hexaKeys[ROWS][COLS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};
byte rowPins[ROWS] = {9, 8, 7, 6}; // Koneksi pin baris
byte colPins[COLS] = {5, 4, 3, 2}; // Koneksi pin kolom

String password = "1234"; // Password yang di inginkan
String key_pass = "";

Keypad customKeypad = Keypad( makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS);

void setup(){
  Serial.begin(9600);
  pinMode(13,OUTPUT);
  
}
 
void loop(){
  char customKey = customKeypad.getKey();
  if (customKey){
    if(customKey == '*') {
      if(key_pass == password) {
        Serial.println("Password Benar");
        digitalWrite(13,HIGH);
        delay(5000);
        digitalWrite(13,LOW);
        key_pass = "";
      } else {
        Serial.println("Password Salah! Ulangi lagi");
      
        key_pass = "0";
      }
    } else if(customKey == 'D') {
        Serial.println("Data Input dihapus, Silahkan Masukan Password lagi");
      
        key_pass = "";
    } else {
      key_pass += customKey;
      Serial.println(key_pass);
    }
  }
}