I use à Tinkerboard in order to manage my device by remote on my laptop. The connection between the laptop and the TB is OK. I create a profil on TB Kstars with Telescope Simulator and QHY CCD.
The QHY 224C (and QHY 183C) are not detected. The message is "No QHY camera detected. Power on?". I use an USB3 hub powered.
Are you using newest version of Kstars? I got this message a couple of weeks ago, only I have ASI cameras, I updated to the newest version and all was well.