Switch died leaving ghost device, Zooz 800 can't join mesh to clean it up

I had a power failure and then things stopped working smoothly. I posted about it over here: After power loss, most switches aren't working...

Eventually we concluded that the switch got fried, so I bought a new one, but the old switch left a ghost behind (that I didn't realize was a problem) and made adding the new one difficult, but eventually with the SS hub app I was able to add it, but not before it created a ghost.

These two ghosts appear to be causing my issues now, so I found the threads about removing ghost devices with a USB Z-Wave stick and got the Zooz 800 Series Z-Wave Long Range dongle. I started following the "Hubitat UZB Stick How-To" instructions, but step 11, where you do the Z-Wave inclusion to add the stick to your mesh doesn't add the stick. The Hubitat says it doesn't find a device, the Z-Wave PC Controller software doesn't see anything, and I've run it dozens of times. I even powered up my old C-7 Hubitat, and it can't add the Zooz stick, or remove the old dead switch (either when unplugged, or jerry-rigged into an outlet to power it up).

I've moved the Hubitat to right next to the Zooz stick (which claims it has a mile of range!), I've switched the stick from Long Range to just "normal", verified it's set for the US (my country), and in general done everything I can think of, including leaving the PC running overnight to see if that helps anything.

Any ideas on what to try to get these things to pair? I have 40-some devices and I'm not liking the idea of having to factory reset all of them and the Hubitat, but it feels like that might be my weekend project if I can't get this Zooz stick to pair.

Thanks!

Still never able to get the Zooz to pair with the Hubitat, but since I was going to be updating Mac OS on my desktop system, I opened up Edge on the PC that was running Z-Wave PC Controller and logged into Hubitat there.

It was able to remove the ghost devices using the regular Hubitat web GUI. I'm flabbergast.

I'll check after I shutdown the Hubitat and move it back to its usual location (not my office desk).

After the move of the Hubitat (which meant a shutdown and un-power/re-power), the ghost devices are still gone and everything was looking "normal", but a few minutes later the problem switch showed as "pending" and the switch in the box next to it also shows as "pending". Numerous "Refresh" clicks in Edge on the PC or Chrome on the Mac don't change anything, but I'll give it a few hours to see if the mesh can heal itself.

if the pending device isn't causing a problem, try to wait a few days before trying to remove it. I've almost always had luck when waiting a few days

They're still showing as "Pending", but like you said, I'll just wait it out another day.

The good news is that the device topology is no longer all red and the device graph now looks like a dense ball AND it's showing the problem switch, which it wasn't doing before.

I feel like I'm sneaking up on the solution!

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After waiting overnight, basically nothing works at this point. Going through the Hubitat GUI to turn switches on or off doesn't work. Clicking refresh over and over sometimes gets devices to show 45 neighbors, but frequently they just stay stuck at 0.

If I use the Hubitat GUI to turn a device on/off, nothing happens, then I go to the Z-Wave details page and that device shows as "Pending" now. Sometimes clicking the individual refresh button a couple of times get it to show neighbors, but it still can't be controlled. Edit: Every device shows as "Pending" now!

The ghosts are gone, but the system still seems very broken. Feels like I need to factory reset every device and the Hubitat and just build it all back up again. Is there any other option at this point?

I can't even add that Zooz 800 stick to the mesh... Something is very wrong, but how do I even figure out what?

Looks like this was all caused by using a PoE adapter to power the C8. Previously I had one powering the C7 without issue. I switched the P8 to my IP controlled PDU and everything seems to be much better.

I still can't join the Zooz 800 to the Hubitat, but everything seems to be working now, so I'll take the win.

Oof, yeah, POE is bad news for the 8-series -- I think there are one or a couple known-to-be-OK POE options, but they are wrecking balls in general.

Search the community here for more info - there are numerous threads about it.

ETA - the 8-series HE hubs are particularly finicky about their power source -- using the stock/included cable & power plug is the safest option.

Yep, I found the issue about the PoE adapters while searching for notes on completely resetting everything and starting over, since it seemed like that was where this was headed.

I'm using the stock power adapter and the stock USB power cable, just plugged into my PDU so that I can power cycle it remotely if needed, and all seems to be working now. Crazy how much trouble PoE caused without obviously being the problem -- power is power, right? Except when it's not.

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Very curious, which POE adapter did you have? I have tested dozens of these, many can't deliver a steady 5 volts@1amp without sagging the voltage almost 20%, even the very pricey ones. I play it safe and let the POE adapter charge my PiPower, which then provides reliable power to my hubs. Bonus, only 1 wire, SWMBO detests the wires.

The first one holds 18650 cells
https://www.aliexpress.us/item/3256801363987333.html?spm=a2g0o.pay_result.pcSmartCardPaySuccess.3.730e3474b2rpuM&gps-id=pcSmartCardPaySuccess&scm=1007.10668.131923.0&scm_id=1007.10668.131923.0&scm-url=1007.10668.131923.0&pvid=635234be-63ac-4b87-8a7c-cbec7a8cefa0&_t=gps-id:pcSmartCardPaySuccess,scm-url:1007.10668.131923.0,pvid:635234be-63ac-4b87-8a7c-cbec7a8cefa0,tpp_buckets:668%232846%238114%231999&pdp_npi=4%40dis!USD!19.65!19.65!!!19.65!19.65!%402101c5ac17138048594885664e1711!12000037389751406!rec!US!712076553!&utparam-url=scene%3ApcSmartCardPaySuccess|query_from%3A

This one, is higher capacity. It takes 21700 cells for a much longer runtime. I am currently using it and it works very well
https://www.aliexpress.us/item/3256805914089508.html?spm=a2g0o.order_list.order_list_main.5.3c271802QM8iZB&gatewayAdapt=glo2usa

I use this one Amazon.com: PoE Splitter 5V2.5A PoE to USB C/Micro USB 2-in-1 Adapter, IEEE 802.3af Compliant PoE Power Adapter for Raspberry Pi 3/4 Security IP Camera/Voip Phone/AP, PTC-AF-5V : Electronics on mine and have had zero issues. Ubiquiti switches for PoE.

This is the one I have: Amazon.com

I bought it thinking they're commodity items and interchangable.

It's running off of a Ubiquity Enterprise 24 port switch.