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

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

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

byte rowPins[ROWS] = {9, 8, 7, 6}; // Pin Arduino untuk baris keypad
byte colPins[COLS] = {5, 4, 3, 2}; // Pin Arduino untuk kolom keypad

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);
LiquidCrystal_I2C lcd(0x27, 16, 2); // Definisi LCD I2C

void setup() {
  Serial.begin(9600);
  lcd.init(); // Inisialisasi LCD
  lcd.backlight(); // Nyalakan backlight LCD
  lcd.setCursor(0, 0);
  lcd.print("Polinema Joss");
  lcd.setCursor(0, 1);
  lcd.print("Elektro Loss");
  delay(5000);
  lcd.clear();
}

void loop() {
  char key = keypad.getKey();
  if (key) {
    Serial.println(key);
    lcd.setCursor(0, 0);
    lcd.print(key);
  }
}