#include <LiquidCrystal_I2C.h>
#include <Keypad.h>

byte customChar[8] = {
  B00000,
  B01010,
  B11111,
  B11111,
  B01110,
  B00100,
  B00000,
  B00000
};
LiquidCrystal_I2C lcd (0x27, 16, 2);

const uint8_t ROWS = 4;
const uint8_t COLS = 4;


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

const uint8_t rowPins[ROWS] {2, 3, 4, 5};
const uint8_t colPins[COLS] {6, 7, 8, 9};
bool aa = false;

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);
char key;
uint8_t curPos = 0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();

  lcd.createChar(0, customChar);

  lcd.clear();
  lcd.print("Hello");
  lcd.print(" World");
  delay(2000);

  lcd.setCursor(2, 1); // oszlop, sor
  lcd.write(customChar);
  lcd.setCursor(0, 1);

}

void loop() {
  // put your main code here, to run repeatedly:
  key = keypad.getKey();

  if (key != NO_KEY) {
    lcd.print(key);
    lcd.setCursor(curPos, 1);
    delay(1000);
    lcd.print("*");
    curPos++;
    if (key == 'D') {
      pinMode(12, OUTPUT);
      digitalWrite(12, HIGH);
      delay(1000);
      lcd.clear();
      lcd.print("RESET");
      delay(1000);
      lcd.clear();
    }

  }


}