Does anyone know when this will work, like it did on the C-7, and if not,
It workson the C8 now - you can join the Hue motion sensors directly to the C8, as Hydro noted. I have two Hue outdoor motion sensors on my C8.
Would spending the money on a Hue Bridge help, and if not,
Probably only if you wanted to get Hue lights and run them via the Hue integration into HE. One thing about using Hue bulbs on a Hue hub w/HE is they are rock-solid/no problem. I've never used Hue bulbs joined directly to the Hub, so can't comment on that.
Who has a sensor that actually works, and that:
a) has battery life beyond a week (Zooz I am looking at you)
b) does not use some weird-o and expensive battery (Zooz again)
Some good Zigbee motion sensors, all join directly to the HE hub:
Hue (indoor and outdoor)
Third Reality (and uses AA or AAA so they last a long time)
Centralite
Aeotec (more expensive)
There is also a newer generation of mmWave motion sensors that could be interesting to you if you're just starting out w/your motion sensing hardware. A key benefit is they can handle the use case when you're sitting still in a room, where traditional motion sensors don't work so well:
I pulled the integration out and tried pairing directly. Same result: it says is it pairing, but doesn't.
I have a possible solution. I have ordered a Lutron Caseta sensor and will run it through my Lutron Caseta hub and integration, which is working flawlessly.
Can't remember exactly, but I remember something about the Lutron integration not passing motion info via the HE integration. You should check into that.
So your Hue sensors won't pair w/the C8? Did you fully reset them? IIRC it's a 15 to 20s hold on the reset button on the back of the sensor.
The Hues should be fine on a C8 - I have two vSML003 sensors paired to mine now, and I had an old SML001 on for a while too (it was since replaced with a 003).
Cancel the Caseta order unless you could use that sensor outside of Hubitat - as others have said, it's a no-go via telnet.
Now what? Do the reset and try try again? I can put the sensor within 2 feet or so of the C-8.
Any tips or tricks are welcome.
EDIT: I found a fresh V2 in my Home Automation stuff. Newer version with an actual button for reset or setup. I followed the IKEA-like instruction sheet and bang! I am up and running perfectly with the fresh sensor.
Yes. I did replace the batteries in the other one even though the factory batteries were healthy. It never worked.
The old one has a recessed button needing something like a SIM extractor tool to work. The newer one has an accessible button. The new one was discovered and in my C-8 in about 5 seconds. Problem solved.
Yes, a paper clip as well. I did hold it til it flashed. Then I held it til it flashed then pressed for one second. And several variations. Nothing. And yes, I installed fresh batteries.
Also, there are a couple of options when joining, something like 'in the clear'. That worked for me one time when a Hue motion sensor would get stuck on initializing....as I recall.
These - may be worth trying, helped some folks get "difficult" devices to join. If your pairing experience doesn't match either case they may not do anything, but can't hurt to try.