/*Keypad example
    by miliohm.com */

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

LiquidCrystal_I2C lcd(0x27, 16, 2); // set the LCD address to 0x27 for a 16 chars and 2 line display

String pad;
const byte numRows = 4;
const byte numCols = 4;
String password = "4321";
String msgA="A:Odaberi kut";
 String msgB="B:Odaberi broj rupa";
 String msg1="Kut je:";
 String Ali="A";
char keypressed;
char mykey;
char keymap[numRows][numCols] =
{
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};
//------------------------------------------------------------
byte rowPins[numRows] = { 9, 8, 7, 6 };
byte colPins[numCols] = { 5, 4, 3, 2 };

Keypad myKeypad = Keypad(makeKeymap(keymap), rowPins, colPins, numRows, numCols); //mapping keypad

void setup() {
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print(msgA);
  lcd.setCursor(0, 1);
  lcd.print(msgB);
  delay(1000);
  
}

void loop() {
  // put your main code here, to run repeatedly:
  readKeypad();
  if (keypressed == 'A'){
    lcd.clear();
    lcd.print(msg1);
  }
  if (keypressed == '#') {
    if (pad == password) {
      lcd.setCursor(0, 1);
      lcd.print("Access Granted");
    } else {
      lcd.setCursor(0, 1);
      lcd.print("Access Denied");
    }
  } if (keypressed == '*') {
    pad = "";
    lcd.clear();
  }
  lcd.setCursor(0, 1);
  lcd.print(pad);
  delay(10);
}

void readKeypad() {
  keypressed = myKeypad.getKey(); //deteksi penekanan keypad
  if (keypressed != '#') {
    String konv = String(keypressed);
    pad += konv;
  }
  
  
}