#include <Keypad.h>

const uint8_t LEDS = 12;
#include <LiquidCrystal.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'}
};

LiquidCrystal lcd(13,11,9,8,7,6);
uint8_t rowPins[ROWS] = { 26, 22, 21, 20 }; 
uint8_t colPins[COLS] = { 19, 18, 17, 16 }; 

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

void setup() 
{
  lcd.begin(16,2);
}

void loop()
{
  char key = keypad.getKey();
  if(key != NO_KEY){
    switch(key){
      case '1': 
        lcd.print("1");
        break;
      case '2': 
        lcd.print("2");
        break;
      case '3': 
        lcd.print("3");
        break;
      case '4': 
        lcd.print("4");
        break;
      case '5': 
        lcd.print("5");
        break;
      case '6': 
        lcd.print("6");
        break;
      case '7': 
        lcd.print("7");
        break;
      case '8': 
        lcd.print("8");
        break;
      
      case '9': 
        lcd.print("123456789");
        break;
      case '0':
        lcd.clear();
        break;

      case 'A': 
        lcd.print("A");
        break;
      case 'B': 
        lcd.print("B");
        break;
      case 'C': 
        lcd.print("C");
        break;
      case 'D': 
        lcd.print("D");
        break;
      case '*':
        
        lcd.print("ABCD#*");
        break;
      case '#':
        lcd.print("#");
        break;

    }
  }
  delay(10);
}