Not sure if you understand some german language? Regardless, if not already done, I’d recommend to join KNX-User-Forum.de and to parse the “Open KNX” and “DIY” sub-forum.
There is a small but very good and professional community developing and building their own devices (HW and SW) which they also sell for comparably small money (<<100€) to interested users. However, as the components are being sold as “DIY sets”, mainly for liability reasons, you need to be capable of soldering some components.
If you have any questions, it is no problem to write in english and you still get replies.
- This reply was modified 11 months, 3 weeks ago by ur63.