A year ago, I installed a KNX interface to include all KNX devices in my Homey environment. I use 79 KNX devices and all has been working smoothly with no issues at all. Than in April 2026 all devices went offline for about a day, and all came back after a day.
Now I have the same problem again and it is lasting for two days now. When opening a device the error message is displayed “Ausgewählte IP-Schnittstelle nicht gefunden / Selected IP interface not found”. The gateway is alive and well in the network and responses to ping requests. All devices are still accessible in the Home Assistant KNX integrations, e.g. lights can be turned on and off and windows shades are operating as expected. But nothing works on Homey!
Any ideas what’s going on here?
Markus
