//Activity 5: Array (4x4 Keypad)
//Aaron John Esguerra
//BSIS - Extension Class

#include <Keypad.h>

const uint8_t CELLA = 4;
const uint8_t CELLB = 4;

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

uint8_t colPins[CELLB] = { 5, 4, 3, 2 };
uint8_t rowPins[CELLA] = { 9, 8, 7, 6 };

Keypad keypad = Keypad(makeKeymap(keys), 
rowPins, colPins, CELLA, CELLB);

void setup() {
  Serial.begin(7000);
}

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

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