// LCD custom characters

#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd (0x27, 16, 2);

byte customchar[][8] = {
  {B11111, B11111, B11111, B11111, B11111, B11111, B11111, B11111}, // full
  {B11111, B11110, B11110, B11110, B11110, B11110, B11110, B11111}, // 4/5
  {B11111, B11100, B11100, B11100, B11100, B11100, B11100, B11111}, // 3/5
  {B11111, B11000, B11000, B11000, B11000, B11000, B11000, B11111}, // 2/5
  {B11111, B10000, B10000, B10000, B10000, B10000, B10000, B11111}, // 1/5
  {B11111, B00000, B00000, B00000, B00000, B00000, B00000, B11111}, // left bracket
  {B11111, B00001, B00001, B00001, B00001, B00001, B00001, B11111}, // right  bracket
  {B00000, B10001, B01010, B00100, B00100, B01010, B10001, B00000}  // "X"
};

const byte sizechar = sizeof(customchar) / sizeof(customchar[0]);

void setup() {
  lcd.init (); // I2C library does not use .display or .begin or .clear
  lcd.backlight();

  for (byte i = 0; i < 8; i++)
    lcd.createChar(i, customchar[i]); // store custom characters in LCD RAM

  for (int i = 0; i < 8; i++) {
    lcd.setCursor(i / 2 + 6, i % 2); // increment cursor location (col, row)
    lcd.write(i);
  }
}
void loop()
{}