Hi,
Some followup....
In trying to resolve the issues I was seeing with the Obi110, I had tried to reset the firmware to the default. This caused the device to keep resetting itself no matter what basic thing I tried to do with it.
Finally tried Obi support as suggested above. They had me try to reset with a paperclip again, and even hold the paperclip in as I powered it up (which sounds like a "deeper reset") but nothing worked. They also had me try using another 12V power supply which didn't work either.
Today, at long last, they remote installed some beta firmware remotely, and that finally succeeded.
[Sort of makes you wonder whether you should rely on a device that's that "beta" for primary communication. I was ready to ask for a refund/replacement, or throw the thing out. Hoping for no more issues like this, and less time spent thinking about use of the Obi.]
Many thanks to all here that helped, and for Obi support for the eventual fix.