#include <LiquidCrystal_I2C.h>

#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

uint8_t smile[8] = {
  0b00000,
  0b00000,
  0b01010,
  0b00000,
  0b00100,
  0b00100,
  0b10001,
  0b01110,
};

void setup() {
  lcd.init();
  lcd.backlight();

  lcd.createChar(3, smile);

  lcd.begin(16, 1);

  lcd.setCursor(0, 0);
  lcd.print("Hello, world! \x03");
}


void loop() {
}