(Edited to add more complete information)
Working through a new install of HA and it now detects so many more things.
I added the Unifi Cloud Key and the Protect cameras and setup the API key and that's all appears to be working.
But there is an additional Unifi item discovered that lists as "default (f4e2c6f17e2b07d91ff20........65675c05.id.ui.direct)
UniFi Network"
(I took 8 chars out of the middle just in case it is a unique link back to my network..
What is this and is there any reason to add it?
The page where you would set it up asks for a username and password and specifies port 443 and SSL. I'm guessing it is completely local but I really want to avoid cloud anything.
Log into your cloud key/management console and check your devices. New(er) naming conventions are the advertised hostname (if any) and some or all of the mac address for the device (that's your f4e2c6... - it's the mac address). The management console will give you more info to help possibly narrow down where or what it is (for example, topology on your network). From there if you might be looking at stickers/on-device settings to try and match that mac.
Sorry. I shortened the hex string because it was rather long and I didn't know if it was a unique vector back to my network. So it isn't a MAC address.
It was displaying longer but also truncated but I found a different page with the complete string. Looks like an internet address but the "id.ui.direct" doesn't seem to resolve in DNS so not sure where it is being resolved. f4e2c6f17e2b07d91ff20........65675c05.id.ui.direct
(I took 8 char out of the middle in case it is an accessible link back to my network.)
So any idea what this might be?
Even though everything I've seen of the current HA is so much more rock solid than the last time I'd looked at it (3 or 4 years ago) I'm still leery of hooking blindly into the system that runs all my wifi.
I'm going to update my original query.
A very old adage of mine: "Never do anything to a network that you're not absolutely certain you can undo!"
So I figured out what HA had detected. The long gobbledygook was supposedly the server name but it wouldn't resolve (not sure how it detected that way) but when given a resolvable address it turned out to be the "Network" portion of Unifi. It had detected the Cloud Key and the Protect portions as 2 separate detected devices. Adding this "mystery device" added the portion where it could detect the APs and what clients are connected, etc. So this will enable presence detection for when the cells are attached to the WiFi.
The fix to get the device to add correctly was to replace the gobbledygook address with a real IP of the CloudKey.
I'd last tried HA 3 or 4 years ago. I am astounded by how much more functionality has been added. It is amazing. (Now if I can get a handle on making good dashboards I'll be able to swap everything over from Hubitat!)