#include <Keypad.h>

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

uint8_t colPins[COLS] = {2, 0, 4, 32};
uint8_t rowPins[ROWS] = {25, 33, 27, 26};

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

boolean num[11][8] = {
  {1, 1, 1, 1, 1, 1, 0, 0},  // 0
  {0, 1, 1, 0, 0, 0, 0, 0},  // 1
  {1, 1, 0, 1, 1, 0, 1, 0},  // 2
  {1, 1, 1, 1, 0, 0, 1, 0},  // 3
  {0, 1, 1, 0, 0, 1, 1, 0},  // 4
  {1, 0, 1, 1, 0, 1, 1, 0},  // 5
  {1, 0, 1, 1, 1, 1, 1, 0},  // 6
  {1, 1, 1, 0, 0, 0, 0, 0},  // 7
  {1, 1, 1, 1, 1, 1, 1, 0},  // 8
  {1, 1, 1, 1, 0, 1, 1, 0}   // 9
};

#define A 12
#define B 13
#define C 14
#define D 15
#define E 16
#define F 17
#define G 18
#define DP 19

void setup() {
  Serial.begin(9600);
  pinMode(A, OUTPUT);
  pinMode(B, OUTPUT);
  pinMode(C, OUTPUT);
  pinMode(D, OUTPUT);
  pinMode(E, OUTPUT);
  pinMode(F, OUTPUT);
  pinMode(G, OUTPUT);
  pinMode(DP, OUTPUT);
}

void loop() {
  char key = keypad.getKey();
  
  if (key) {
    Serial.print("ไหน...กดเหี้ยไรต่อไป: ");
    Serial.println(key);
    
    if (key >= '0' && key <= '9') {
      int numToDisplay = key - '0'; 
      show_num(numToDisplay);
    }
    else if (key == '#') {
      digitalWrite(DP, HIGH);
    }else if (key == '*') {
      digitalWrite(DP, LOW);
    }
  }
}

void show_num(int a) {
  for (int i = A; i <= DP; i++) {
    digitalWrite(i, num[a][i - A]);
  }
}