hello 1132105369,
may I know what’s the use-case,
you may dump EEPROM for the board-id, as I mentioned in post #3.
you can also check DTB for serial number, for example, $ cat /proc/device-tree/serial-number
If you want the UUID, please check below sysnode for details. i.e. $ cat /proc/device-tree/chosen/uuid
here’s also similar discussion thread for your reference, Topic 77503.
thanks