#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 20, 4);

/*

  byte customChar[] = {
  // Pfeil nach oben
    0b00100,
    0b01010,
    0b10001,
    0b00000,
    0b00100,
    0b01010,
    0b10001,
    0b00000,
  };

  // Tropfen
    0b00010,
    0b00110,
    0b00110,
    0b01110,
    0b01111,
    0b11111,
    0b11111,
    0b01110,

		 // Thermometer
    B00100,  // --X--,
		B01010,  // -X-X-
		B01010,  // -X-X-
		B01110,  // -XXX-
		B01110,  // -XXX-
		B11111,  // XXXXX
		B11111,  // XXXXX
		B01110   // -XXX-
*/




// Make custom characters:
byte Heart[] = {
  B00000,
  B01010,
  B11111,
  B11111,
  B01110,
  B00100,
  B00000,
  B00000
};
byte Bell[] = {
  B00100,
  B01110,
  B01110,
  B01110,
  B11111,
  B00000,
  B00100,
  B00000
};


void setup() {
  lcd.init();                      // initialize the lcd
  lcd.backlight();
  // Create new characters:
  lcd.createChar(0, Heart);
  lcd.createChar(1, Bell);
  
  // Clears the LCD screen:
  lcd.clear();
  // Print a message to the lcd:
  lcd.print("Custom Character");
  delay(1000);
}

void loop() {
  // Print all the custom characters:
  lcd.setCursor(0, 1);
  lcd.write(byte(0));
  lcd.setCursor(0, 2);
  lcd.write(byte(1));
}