I am on my second replacement hub and cannot connect my 20+ Samsung sensors. These were originally connected to a v2 hub. It quit working, so I bought a new one a couple of weeks ago. It worked with all wifi & zwave devices, but not Zigbee. I replaced that hub with a brand new one yesterday with same results. The devices act as if they are connecting to the mesh network, but neither smartthings apps will detect them. I have followed all reset instructions many times. Samsung support has been less than helpful. Any idea how I can get this going. I refuse to replace nearly $1000 worth of perfectly good sensors.