I recently migrated to a complete source-build of indilib and 3rd-party drivers with all bells an whistles on a Pi4/bullseye and its fantastic.
I am curious about the indi-3rdparty/libqhy SDK version.
When I run the driver for the qhy600 it tells me that it uses SDK 23.7.16.
This version is also referenced on github.com/indilib/indi-3rdparty/tree/master/libqhy
I only can not find any SDK sources from QHY on the net, only precompiled libraries.
Do you need a special contract or NDA with QHY to get access to these sources?