#include <Keypad.h>

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

uint8_t colPins[COLS] = {12,11,10,9,8};  // C1–C4
uint8_t rowPins[ROWS] = {4,5,6,7};    // R1–R4

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

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

void loop() {
  if (keypad.getKeys()) {
    for (int i = 0; i < LIST_MAX; i++) {
      if (keypad.key[i].stateChanged && keypad.key[i].kstate == PRESSED) {
        char k = keypad.key[i].kchar;
        int row = keypad.key[i].kcode / COLS;
        int col = keypad.key[i].kcode % COLS;

        Serial.print("Tuş = ");
        Serial.print(k);
        Serial.print(" | RowPin = ");
        Serial.print(rowPins[row]);
        Serial.print(" | ColPin = ");
        Serial.println(colPins[col]);
      }
    }
  }
}


/*
#include <Keypad.h>

const uint8_t ROWS = 4;
const uint8_t COLS = 5;
char keys[ROWS][COLS] = {
  { '1', '2', '3', 'A'  },
  { '4', '5', '6', 'B'  },
  { '7', '8', '9', 'C'  },
  { '*', '0', '#', 'D'  }
};

uint8_t colPins[COLS] = { 5, 4, 11, 10 }; // Pins connected to C1, C2, C3, C4
uint8_t rowPins[ROWS] = { 9, 8, 7, 6 }; // Pins connected to R1, R2, R3, R4

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

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

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

  if (key != NO_KEY) {
      Serial.print("düğme=");
    Serial.println(key);

  }
}
*/