#include <Keypad.h>

const uint8_t BARIS = 4; //jumlah garis ksypad
const uint8_t KOLOM = 4; //jumlah kolom keypad
char keys[BARIS][KOLOM] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'},
};
uint8_t colPins[KOLOM] = {5,4,2,15}; //pin yang terkoneksi dengan
uint8_t rowPins[BARIS] = {22,21,19,18}; //pin yang terkoneksi dengan

Keypad Keypad = Keypad(makeKeymap(keys), rowPins, colPins, BARIS, KOLOM);
void setup() {
  Serial.begin(9600);
  
}

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

  if (key != NO_KEY) {
    Serial.println(key);
  }
 
}