* Display On - 0xFE 0x42 - This command turns the display backlight on . The argument is how many minutes to stay on, the command is supported but we don't handle the timeout so that number is ignored | * Display On - 0xFE 0x42 - This command turns the display backlight on . The argument is how many minutes to stay on, the command is supported but we don't handle the timeout so that number is ignored |