#include <Keypad.h>
#include <Wire.h>
#include<LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);

const byte ROWS = 4; //four rows
const byte COLS = 4; //four columns

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

byte rowPins[ROWS] = {9, 8, 7, 6}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {5, 4, 3, 2}; //connect to the column pinouts of the keypad

//Create an object of keypad
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

void setup(){
  Serial.begin(9600);
  lcd.init();                    
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Arduino Keybad");delay(2000);
  lcd.setCursor(0, 1);
  lcd.print("by ielectrony");
  delay(5000);
  lcd.clear();
  lcd.print("Keybad Test ^_^");
  lcd.setCursor(0, 1);delay(5000);
  lcd.clear();lcd.print("Now Press any ");
  lcd.setCursor(0, 1);
  lcd.print("          key");
}
  
void loop(){
  char key = keypad.getKey();// Read the key
  
  // Print if key pressed
  if (key){
    Serial.print("Key Pressed : ");
    Serial.println(key);
    lcd.setCursor(0,0);
    lcd.print("Key Pressed :");
    lcd.setCursor(14,0);
    lcd.print(key);
    lcd.setCursor(0, 1);
    lcd.print("by ielectrony");
  }
}