#include <Keypad.h>

const uint8_t BARIS=4; //jml baris keypad
const uint8_t KOLOM=4; //jml 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};
uint8_t rowPins[BARIS]={22,21,19,18};

Keypad keypad=Keypad(makeKeymap(keys), rowPins, colPins, BARIS, KOLOM);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  //Serial.println("Hello, ESP32!");
}

void loop() {
  // put your main code here, to run repeatedly:
  //delay(10); // this speeds up the simulation
  char key = keypad.getKey();
  if(key != NO_KEY){
    Serial.println(key);
  }
}