Hello @Will_71 and welcome to Gladys!
Great job on your setup, it’s nice to see such a complete installation ![]()
Indeed, for now Gladys is not compatible with Debian 11 / Ubuntu 21. Max Debian 10 / Ubuntu 20.04. We are working on compatibility.
Currently, we use Open-Zwave, a historic open-source library for controlling Z-Wave.
Two things:
- This library is no longer maintained. We are trying to migrate to the new library (ZWaveJS), but it’s a lot of work
- In the meantime, there is little support for the current integration, and some devices are not supported. You have to be patient with these devices

Awesome! Don’t hesitate if you have feedback or requests for new features. We are listening, and Gladys evolves regularly.