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

const int ROW_NUM    = 4; 
const int COLUMN_NUM = 4; 

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

byte pin_rows[] = {2, 3, 4, 5};
byte pin_column[] = {6, 7, 8, 9};

Keypad keypad = Keypad(makeKeymap(keys), pin_rows, pin_column, ROW_NUM, COLUMN_NUM);
LiquidCrystal_I2C lcd(0x27, 16, 2); 

void setup(){
  lcd.begin(16,2);
  lcd.backlight();
  lcd.print("Kelompok 5");
  delay(3000);
  lcd.clear();
}

void loop(){
  char key = keypad.getKey();
  
  if (key){
    lcd.setCursor(0, 0);
    lcd.print("Tampilkan: ");
    lcd.setCursor(0, 1);
    lcd.print(key);
  }
}