I am desperately trying to find out if there is a way to configure knx entities in home assistant to not lose their state after some hours and instead just stay on the last known value.
I have a problem where i have a rolling shutter device that seems to have status endpoints and callback endpoints but doesnt trigger updates on those at all.
Therefore i would really like to just set an entity to never go unknown/unavailable unless maybe contact to the IP bridge is lost - right now it feels like the options just let me chose between options where after 24 Hours of no change all my rolling shutters will look like they’re unavailable just based on the fact that i dont move them and i dont have a group address to re-read the current status
Hi 
! Loosing connection is the only cause a Knx entity is set “unavailable”. So
means you lost your connection.
If it has status endpoints, check its flags in ETS. Read flag should be set for those.
I just looked at the state again - the value is "unknown" not "unavailable" if that matters.
I'm using the OpenKNX Ethernet Router.
It seems as though you might be right in that the IP Router is restarting or something at that exact time.
Though i feel like there should still be a way to not invalidate the values if i dont have read addresses available - i will check another time for sure but last i tested using the ETS monitor the device was literally not responding to group addresses assigned to the status endpoint of the device.
it does. “unavailable” means there is no connection so it can’t be controlled. “unknown” means the current state is not known, but it can be controlled.
This is most likely one of
- missing read-flag
- coupler filter table issue
- bug in the devices application
On purpose? An interface will probably disconnect it’s clients when you update the application or do a bus reset. Apart from that, check your network infra stability.