#include<LiquidCrystal.h>
#include <Keypad.h>
const int rs=12, en =11, d4 = 5, d5 =4,d6 =3, d7=2;// 

LiquidCrystal lcd(rs,en,d4,d5,d6,d7);

const int ROW_NUM = 4;
const int COLUMN_NUM = 4; 

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

byte pin_rows[ROW_NUM] = {10, 9, 8, 7};
byte pin_column[COLUMN_NUM] = {6, 1, 0, 13};

Keypad keypad = Keypad( makeKeymap(keys), pin_rows, pin_column, ROW_NUM, COLUMN_NUM );



void setup() {
Serial.begin(9600);
lcd.begin(16,2);
}

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

  if (key){
    lcd.print(key);
    //Serial.println(key);
  }


}