Cara simple menggunakan Keypad dengan ESP32

#include <Arduino.h>

#include <Keypad.h>

const byte rows_keypad = 4;
const byte cols_keypad = 4;
 
char keyMap_keypad[rows_keypad][cols_keypad] = {
{'1', '2', '3', 'A'},
{'4', '5', '6', 'B'},
{'7', '8', '9', 'C'},
{'*', '0', '#', 'D'}
};
byte rowPins_keypad[rows_keypad] = {9, 8, 7, 6};
byte colPins_keypad[cols_keypad] = {5, 4, 3, 2};
Keypad keypad = Keypad(makeKeymap(keyMap_keypad), rowPins_keypad, colPins_keypad, rows_keypad, cols_keypad);


char baca_keypad() {
char key = keypad.getKey();
return key;
}


void setup()
{
Serial.begin(9600);

}
void loop(){
char key_keypad = baca_keypad(); // Memanggil fungsi bacaKeypad()
if (key_keypad != NO_KEY) {
Serial.print("Tombol: ");
Serial.println(key_keypad);
}


}