#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
//define the cymbols on the buttons of the keypads
char hexaKeys[ROWS][COLS] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};
byte rowPins[ROWS] = {3, 2, 1, 0}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {12, 11, 10, 9}; //connect to the column pinouts of the keypad

//initialize an instance of class NewKeypad
Keypad customKeypad = Keypad( makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS); 

void setup(){
  
  Serial.begin(9600);
  lcd.init();
   lcd.backlight();
}
  
void loop(){

char customKey = customKeypad.getKey();
  
  if (customKey){
    Serial.println(customKey);
  
    lcd.setCursor(3,1);
 lcd.println(customKey);
 //lcd.clear();
    
  }
}