device.serial_numbers.usb_host_option_board
device.serial_numbers.usb_host_option_board

device.serial_numbers.usb_host_option_board

This command retrieves the serial number of the USB host option board. For printers that do not store this value, the printer returns an empty string.

Getvar

To return the USB host option board serial number:
! U1 getvar "device.serial_numbers.usb_host_option_board"