Can't pair any Zigbee devices on C-8

[mpoole32]

Overall silence on this issue is not helping things at all. I can understand issues and taking time working through them but, silence for this long is making things worse from where I sit.

[NotBernard65]

Indeed. I'm coming here from Home Assistant and unless things improve soon, it's looking like I will be returning my C8 and scurrying back to HA. Like you say the 'silence' is the most frustrating thing. I accept there will be issues along-the-way, but little/no communication doesn't boost the confidence.

[danabw]

Hubitat @support_team has been very busy w/multiple FW updates for the C8 and helping customers who are experiencing related issues. I'm sure they will be able to help soon.

@NotBernard65 @mpoole32 - Have either of you tried moving the devices close to the hub to see if that makes any difference during pairing attempts? Do you see any messages when attempting a pairing? Or just the timer counting down?

[rlithgow1]

How about just doing a standard zigbee pairing (don't use the by brand/model method)

[shawnx1]

Just roll the firmware back to when you first received the hub. You should be able to pair devices then.

[mpoole32]

My issues go way beyond just a device not pairing.
Sengled bulbs are still an issue. Sensors that worked on C3 and C5 don't work.

All as I wrote before made worse by no communication.

The forum is full of posts made by those dealing with these issues.

Doing things like moving a device closer to the hub to see if it might possibly pair is shooting in the dark which is also what my wife experiences when she walks in a room and those sengled bulbs don't come on. It's a coin toss at this point if it's the bulb or the sensor that's misbehaving.

I've had the C8 now for a month and that for me under these circumstances is where my patience starts to run out.

Sengled Bulbs on a C8

Any word from the developers on when we might see a fix to keep some sengled bulbs from dropping off the zigbee network when using a C8? I am also still having issues with contact sensors as well.

Can't pair any Zigbee devices on C-8

I'm very new to Hubitat and have a C8. I have a few (non-Zigbee) devices connected and all good with them. However I have tried to directly pair a Hue Dimmer Switch (V1) and also a Ikea Tradfri Plug using the Devices -> Add devices -> Find By Brand route and they will not pair. I have reset both the Hue & Tradfri items and nothing happens during the pairing cycle. Is there any way I can check to see if the Zigbee element of my C8 is actually working?

Odd Zigbee Behavior on the C-8

I'm observing strange behavior with Zigbee on the C-8; I may not have accurately nailed down all the details, but I'll outline them here in case anyone can corroborate. TL;DR: What I appear to be seeing: shortID's shown in the hub's child table don't match those shown in the Zigbee details page. They never change, even when a shortID of the child does change on rejoin; child table devices show NULL instead of name, and "type:UNKNOWN" The C-8 should be assigning randomized shortID's on devic…

Zigbee rebuild - C8

Can anyone tell me what the Zigbee network rebuild does, in C8... I've used it to try and resolve an an ongoing issue i have with Zigbee devices simply not responding (sporadically) but i cant say that it helps. thx

Cannot pair several zigbee devices with new C8

I purchased a new C8 hub for my daughter at her new home. I am an experienced Hubitat owner and user with many zigbee and zwave devices. I am now attempting to pair several zigbee devices; ThirdReality motion sensor, ThirdReality water leak sensor, and cmars smart plug. In each case, it says "found a zigbee device", but it doesn't complete initialization. I have rebooted the hub, reset the zigbee radio, and reset the devices. What am I missing? P.S.: I have succeeded in pairing one zwave …

C8-zigbee recycle - v.121

I noticed that my hub's zigbee radio recycled frequently over the course of the day... I assume this is not normal but trying to understand what triggers a radio to recycle.... could it be a throughput issue ? I have my automations driven my Webcore.. could I be overloading the zigbee network (sounds ludicrous, but i simply dont know) ? See below , I recycle by HE every night using the Rebooter app, just to keep things clean... then see the Zigbee radio recycles.. [2023-04-03 at 9.49 A…

Is new update .121 working?

Before I push the update button is the new C8 working with .121. I am not willing to go down another rabbit hole, I have reservations on making things worse that it has been. I have had things stabilize after i moved the devices that were dropping to the C7 and used it as a mesh hub.

[user5040]

Some success, mainly through resilience, not skill or technique. I never got my zigbee plugs to pair (despite them being on the compatible list), but have managed to pair a different brand now (which are NOT on the compatible list) using a generic driver. Didn't get a sonoff motion detector to work, or one from another brand (same as the plugs that worked!). Have today got some sonoff door sensors to work. Still feels very unstable and I'm not filled with confidence that any given device will work!

[NotBernard65]

I'm not sure what version it actually shipped with (since I did an immediate upgrade on installation), however I did subseqently upgrade it again, so the issue I have has unfortunatly persisted over two versions.

[NotBernard65]

Devices were in close proximity of the C8. No messages. just the countdown to zero.

[shawnx1]

Just pick the earliest one. I'm pretty confident you will be able to pair devices. then when the Hubitat team gets things worked out upgrade then.
What do you have?

Make sure to Reset the Zigbee Radio

[danabw]

@shawnx1

roll the firmware back to when you first received the hub

FWIW I have had the opposite experience, device pairing and persistence on my Zigbee mesh has improved from early releases to current. Currently on .121 both Sengled bulbs and Hue motion (initially my hardest devices to keep connected) are both solid again.

But given the range of experiences we're seeing here (from zero issues/all working to significant/blocking problems), makes sense to try a range of things, including falling back to an earlier release to see if it helps.

FWIW, problems w/Sengled bulbs (in my case color and bright 1500 lumen versions) actually began on the C7 well before the C8 release (after being perfect for me for >3 years). Others in the forum were starting to report issues on the C7 before the C8 as well. However, as of .121 on the C8 my Sengled are once again staying connected/solid, so the bulbs are pairing/working well on some meshes. Just not all, and finding the reason(s) why the differences has not been easy.

Two areas to look into:

1. Zigbee transmission power level: The C8 has an antenna and ships w/it set to power level 16. The C7 had the rough equivalent of power level 8. Some have improved results by lowering their C8 Zigbee power setting. Settings>Zigbee Details
   

2. Wi-Fi interference: Given the higher power of the C8 antenna, the 2.4ghz C8 Zigbee signal may be more likely experience interference w/2.4ghz Wi-Fi. See info below, worth checking/ruling out:

ZigBee and Wi-Fi Coexistence

[shawnx1]

But given the range of experiences we're seeing here (from zero issues/all working to significant/blocking problems), makes sense to try a range of things, including falling back to an earlier release to see if it helps.
Yep can't hurt especially for the people not being able to pair any zigbee devices. I"ve actually tried it myself with some of the devices people are having problems with. Rolling back worked for me also rebuilding the network before pairing zigbee devices works as well.

[danabw]

@shawnx1

rebuilding the network before pairing zigbee devices works as well.

From some things that @Tony has seen, if you rebuild your Zigbee network, rebooting your Zigbee radio after you finish pairing is a good idea...otherwise the next time you reboot your hub you may experience some issues initially w/your Zigbee mesh. Did I get that right, Tony?

[NotBernard65]

So I've downgraded to 2.3.4.148 (was previsouly at 2.3.5.118 then 2.3.5.121) still no joy (also reset the radio).
Also tried adding as a generic Zigbee device and nothing.

[danabw]

@NotBernard65

also reset the radio).

Sorry - do you really mean you "Reset" your Zigbee radio (red button) or did you "Rebuild Network?"

[mike.maxwell]

what other hubs are running, and on what zigbee channels?
what channel is your c8 running on?, and at what power level?
What device did you try adding?
Have you ever been able to add any device to your C8?

[shawnx1]

I'm pretty sure he reset he couldn't get any devices to pair in the first place so shouldn't have hurt

[NotBernard65]

what other hubs are running, and on what zigbee channels? - Only other Zigbee things are via Hue bridge (ch=25)
what channel is your c8 running on?, and at what power level? - ch=11/power=16
What device did you try adding? Hue Dimmer (V1) x 2 (factory reset and removed from Hue bridge), Ikea Tradfri Plug
Have you ever been able to add any device to your C8? No

thanks

[mike.maxwell]

try changing the channel to 25, drop the power to 8, then try joining the Tradfri plug again
crap, with hue on 25, try 15 or 16

[NotBernard65]

I just updated my previous post (Hue bridge is using channel 25). So ok to mirror that?