#include <Keypad.h>

//========================================================
//Matrix Button===========================================
const uint8_t ROWS = 8;
const uint8_t COLS = 3;
char keys[ROWS][COLS] = {
  { '1', '2', '3' },
  { '4', '5', '6' },
  { '7', '8', '9' },
  { '*', '0', '#' },
  { 'A', 'B', 'C' },
  { 'D', 'E', 'F' },
  { 'G', 'H', 'I' },
  { 'J', 'L', 'K' }
};

uint8_t colPins[COLS] = { 23, 13, 32 };                     // Pins connected to C1, C2, C3
uint8_t rowPins[ROWS] = { 27, 26, 25, 33, 12, 18, 19, 5 };  // Pins connected to R1, R2, R3, R4, R5, R6, R7, R8

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

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

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


void setup() {
  Serial.begin(115200);


}

void loop() {
  GetKeypadData();
  
}