Domoticz

I'm still running an old Debian distribution with Mochad and Huye for X10 interfaces but like to upgrade my domoticz...

Does anyone know if mochad and Heyu run on Debian Buster or that i have to add an old Pi just to do the X10 interfacing?

The most recently released version is Debian 10, codenamed Buster. The previous version Debian 9 Stretch is officially supported until June 2022. The newer version offers a longer support period and new features, so it is highly recommended to upgrade if running Debian 9.