I recently updated to OH 2.5.6 and I discovered that my Osram Smart Plug connected to Deconz now can be managed directly with Deconz binding and not using Hue Binding as before. But the offline status for these devices is never reported by the binding. I checked with the rest interface but when the ‘reachable’ status is false the thing is still online.
That‘s not exactly a problem but a missing feature. Unfortunately I‘m very busy with my job, could you enter an issue on GitHub, so I don‘t forget about it?