[kipper2k]

Originally Posted by sampedenawa

The 4-digit code is the unique id code of each board, coming from the unique id code of the STM32 assembled on it.


In order to be able to run on any single hardware, each copy of the firmware must be signed/encrypted with a matching code.


So, in poor worlds, each firmware copy is 1:1 tied to one and only one board.




https://en.wikipedia.org/wiki/List_o...ackaging_types

So it is a copy protection then ?