All of a sudden, my Vera 3 (on UI5) has become rather unreliable. I have not made any changes to my setup recently, and the unit has been operating very well for the past months / years. What happens is that at some point, all Z-Wave communication from Vera stops working. Incoming messages are still processed (such as sensor readings), and stuff operated through plugins continue to work (like Hue lights), but any command sent to a Z-Wave device will time out and fail.
I used to have a imilar condition from time to time in the past, apparently it is a known problem when using a lot of Danfoss TRVs. In that case, I had to reboot Vera to get everything to work again, but that condition only happened once a month or so. Recently I am getting Z-Wave blockages several times a day. The strange thing is: in this case restarting the Luup engine is enough to clear the problem.
I don’t see anything strange in the log files, at least I am getting the same messages when everything is ok and when Z-Wave is broken. At this point I have no idea where to look, especially since nothing has been changed recently. No new devices or plugins added.
