Hi all. I had no trouble adding the Sylvania/Osram Zigbee Smart Plugs to ST, like others have stated they show up as a Thing - so you just change the type to Zigbee Switch and they work. (Some other DTH also work). So, no problem with getting them connected and working (just so people know I’ve gotten past that initial hurdle that gets some people tripped up).
The issue I"m having is with range. When these plugs are close to my ST hub, they work great. As distance increases, they fall off quickly until they’re unresponsive - apparently no connection. They should join the Zigbee Mesh, but don’t seem to be. I have Zigbee bulbs much farther away from the hub than these plugs (working fine), some next to these plugs (working fine), some between the hub and these plugs (also working fine). In essence, these plugs are surrounded by reliably functioning Zigbee (not Z-Wave) devices - so the Zigbee mesh should be fairly robust. These plugs just don’t seem to be using it, unlike all the functioning Zigbee devices around them. If I move them closer to the hub again, they begin to work perfectly.
It looks to me that they’re connecting directly to the hub, and only to the hub - not to the Zigbee mesh network. No idea why, as they’ve all been added to ST successfully. Anybody have any tips or advice? Thanks for any and all help!! Insecure rejoin is enabled.