PiAware no longer uses the devices MAC addresses....

[jprochazka]

So take the existing ID from the configuration file or ask the user for their old one.
https://discussions.flightaware.com/t/setting-up-test-site/33718/18?u=jprochazka

[orionjb2001]

Great idea. Saves having to run the Piaware script post install, sudo piaware-config feeder-id xxxxxxxx-xxxxxxx .

[jprochazka]

Will be part of a revamped backup script which will handle RRD file backups properly. Shouldn't have to worry about resetting the ID by simply upgrading things but inorder to know for sure I have to wait for the next PiAware update.

[orionjb2001]

I haven't had any issue with doing a simple upgrade using the same card, but if re-imaging a brand new card, that is when it happens, so something during the install would be good. :)