#include <Keypad.h>
#include <LiquidCrystal.h>
const int rs = 7, en = 6, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd (rs, en, d4, d5, d6, d7);
const byte ROWS = 3;
const byte COLS = 3;
char hexaKeys[ROWS][COLS] = {
  { 1,  2,  3},
  { 4,  5,  6},
  { 7,  8,  9},
};
byte rowPins[ROWS] = {8, 9, 10};
byte colPins[COLS] = {11, 12, 13};
Keypad customKeypad = Keypad( makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS);
unsigned char customKey;
void setup() {
  lcd.begin(16, 2);
}

void loop() {
  customKey = customKeypad.getKey();
  if (customKey != 0)
  {
    if (customKey == 1)
    {
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("1");
    }
    if (customKey == 2)
    {
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("2");
    }
    if (customKey == 3)
    {
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("3");
    }
    if (customKey == 1)
    {
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("1");
    }
    if (customKey == 4)
    {
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("4");
    }
    if (customKey == 5)
    {
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("5");
    }
    if (customKey == 6)
    {
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("6");
    }
    if (customKey == 7)
    {
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("7");
    }
    if (customKey == 8)
    {
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("8");
    }
    if (customKey == 9)
    {
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("9");
    }
  }
}