How does QGC recognize hardware types?

1

Dear all,
I have a question in terms of QGC recognizing px4 hardwares. When I connect pixracer to QGC to flash firmware, it can precisely recognize this is a fmuv4 hardware. How can it achieve that?
Any advise is appreciated.

2

Boards report unique ids. You should see it reported in the text of the firmware flashing page in QGC.

3

Thanks for the reply. I saw it. I just want to know how the boards know their unique ID. Is it set in advance or something else?
EDIT: when the board only has bootloader (no firmware flashed) in it, it still knows its ID. How is it achieved?

4

It’s set in the bootloader. https://github.com/PX4/Bootloader/blob/master/hw_config.h#L119

5

Oh, yes! I see. Thanks!