#include <Keypad.h>

#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);

const byte ROWS = 4;
const byte COLS = 4;

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

Keypad kpd = Keypad(makeKeymap(hexaKeys),rowPins, colPins, ROWS, COLS);


int seconds = 0;
String msg=("HIT A PAD KEY!");
int numBlinks;
int bt =500;
int j;

void setup()
{
  Serial.begin(9600);
  LCD.begin(16, 2);
  LCD.print(msg);
}

void loop()
{
  char key = kpd.getKey();
  LCD.setCursor(0, 1);
  LCD.print("");
  if(key)  // Check for a valid key.
  {
   
   LCD.print(key);
   
    
  }
  
}