@teastain yeah. It seems that, if I can't life with the asterisk, I'll have to draw a circle 😅
I'm unable to print the "degree symbol" (°) on the integrated LCD.
I tried different options like: char(176), char(223), 0XDF, 0XB0, even the binary version. In the serial monitor everything works fine, but not on the LCD. Is it possible, that the used driver of the LCD isn't able to show the sign, meaning it can only print the ASCII symbols up to 128?