#include <Wire.h>
#include <Keypad.h>
#include <LiquidCrystal_I2C_Hangul.h>

LiquidCrystal_I2C_Hangul LCD = LiquidCrystal_I2C_Hangul(0x27, 16, 2);
const int rows = 4 ;
const int cols = 4 ;
char keys [rows] [cols] ={
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
} ;
uint8_t colpins [cols] = {26,25,33,32};
uint8_t rowpins [cols] = {13,12,14,27};

Keypad keypad = Keypad(makeKeymap(keys),rowpins,colpins,rows,cols);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  LCD.init();
  LCD.backlight();

  LCD.setCursor(0, 0);
  LCD.print("Welcome");
  LCD.setCursor(0, 1);
  LCD.print("My First Project");

  pinMode(2, OUTPUT);
 
}

void loop() {
  digitalWrite(2, HIGH);
  
  char key = keypad.getKey();
  // Serial.print(key);
  // delay(100); 
  LCD.print(key);
  Serial.println(key);
  delay(500); 
}