KC868-H32B integrate into Loxone home automation system guide have uploaded on YouTube channel. You can turn ON/OFF relay and update relay state by Loxone MiniServer. It work as Loxone extension module, now if you have Loxone MiniServer, you can use Loxone phone application.
Here is YouTube video guide playlist: https://www.youtube.com/playlist?list=PLQUWhE_6LeOS6DbS0t3vGRrIFSG_gIoQt