#include <Wire.h>
#include <LiquidCrystal_I2C.h>

// Set the LCD address to 0x27 in PCF8574 by NXP and Set to 0x3F in PCF8574A by Ti
LiquidCrystal_I2C lcd(0x27, 16, 2);

byte customChar[] = {
  B11011,
  B10100,
  B10010,
  B10000,
  B10100,
  B10000,
  B10010,
  B10000
};

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

void loop() 
  {
    lcd.createChar(22, customChar);
    lcd.home();
    lcd.write(22);
  }