Thanks @rlithgow1. Good thoughts on being attentive to hex vs dec. Zniffer displays the source and destination in decimal notation, but I checked both just to be sure.
I figured out the source of the problem this morning. It was the hub. What puzzled me about this is that a reboot did not clear the problem. The Z-wave radio kept transmitting during the entire reboot process.
I found the source by using the receive strength information (RS column) in the Zniffer. There wasn’t a lot of change in signal strength, but enough to show the strongest signal when I got the Zniffer close to the hub,
With this truth in hand, I completely shutdown the hub and powered it off. I have in-line power switches on my hubs to make this very easy. All of the transmissions stopped. I also failed to mention every one of these transmissions had a CRC Error.
On restarting the hub, all was well again.
I asked my wife, she works at home, if she had seen any power fluctuations. There were storms in the area yesterday. She hadn’t. Couple that with my hub being on a UPS, and I can’t figure out how the hub got in that condition. At least I did get everything running properly again.
