#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 rowspin [baris] = {14,12,19,18};
byte colspin [kolom] = {5,4,2,15};

Keypad keypad = Keypad(makeKeymap(keys), rowspin, colspin, baris, kolom);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  lcd.init ();
  lcd.backlight ();
  lcd.setCursor (0,0);
}

void loop() {
  // put your main code here, to run repeatedly:
  char key = keypad.getKey();

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