I updated my X6100 to
R1CBU 0.20.1.
Oleg provided a tgz
with only the updated files,
so I dropped the file into /DATA partition,
started up the radio,
and it unpacked the update.
The tgz contained the x6100_ui binary and params.db.
This can be an interesting way to make my own updates without needing
to know how to rebuild the entire image.
I see the changes applied to his
x6100_gui github repo,
so I know that’s a good base
for making future changes.
Learning to do make updates is interesting, because the original maintainer, Oleg, is likely done updating this firmware in favor of building his own radio in the image of the X6100. He’s frustrated trying to get help and documentation from Xiegu. I run the R1CBU firmware full-time.