I have noticed a new device in my smartthings app called z-wave controller. For the life of me, i cannot figure out what it is and where it came from. It has an On Off, which does nothing when i hit it. I tried to remove it from the device list, but it asks me to use the Exclude command. How can i run the exclude command if i dont know what device it is. Can anyone suggest how to determine what device this is and, how it got added and how i can remove it? Thanks in advance.