#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};
byte colPins[KOLOM]={5,4,2,15};
Keypad keypad = Keypad( makeKeymap(keys),rowPins,colPins,BARIS,KOLOM);
void setup() {
Serial.begin(9600);
lcd.init();
lcd.backlight();
lcd.setCursor(0,0);
}

void loop() {
char key = keypad.getKey();

  if(key!=NO_KEY){
    lcd.print(key);
  }
}