Thank you for the info, @johnconstantelo.
My ST hub sees the Ecolink Motion Sensor seconds after I attempt to include it. The problem is that it identifies it as a Door Contact. This happens even when I explicitly say that the device that I am about to include is E.M.S.
From previous rummaging around, it appears that the Ecolink Motion Sensor worked well with SmartThings until recently. Perhaps a recent software update induced the problem.
I will try another unit and poke around in the IDE, which I haven’t touched yet.
Since my previous posting, I have added:
o SmartThings Moisture Detector
o SmartThings Motion Detector
As a beginner, I now have 9 devices paired with the ST hub. The ST Motion Detector didn’t identify as the correct model, but it did identify. Only the Ecolink Motion Detectors won’t pair as the right type of device.
Next up: A few more doors and windows.
But after that, I have to get the Motion Detectors running. IDE, here I come!