Lost all my ZigBee devices on a new hub. I recently moved into a new house and installed 30 ZigBee Smartwings shades. I purchased a Habitat Elevation C-8 Pro and successfully connected to the 30 Smartwings shades and Google Home to the hub—Every shade worked with voice control. Every room was working with voice control. However, when I asked Google Home to close all the shades, a few of the shades didn’t close. I verified that I could ask to open and close each of the seven rooms, and all shades responded correctly. The next morning, the shades were disconnected, but I restarted the radio, and the ZigBee shades seemed to work correctly. All the shade would drop every night, and finally, restarting the Zigbee radio, rebuilding the ZigBee network, or restarting the hub would not connect to any ZigBee devices. However, the ZigBee graph shows I am connected to device 0000, which is colored green (and the hub is red). I checked the chatbot and documentation to no avail. Please note that I only have 30 ZigBee Smartwings shades on the hub, no other devices. The devices are still listed in the hub, but on connected. Did my ZigBee radio break in the first week of use?
Yes, the hub and radio are at the latest firmware versions. Commands from Google Home to Habitat Hub are being received. Commands at the Hub to start the process of opening the shade. I can access the hub from both the web browser and my iPad.
I am not familiar with these shades. Are they line powered (hard-wired) or battery powered? In either event, the issue could be the lack of a robust zigbee mesh. The Hubitat documentation provides some guidelines in the construction of a solid and performant zigbee mesh.
https://docs2.hubitat.com/en/how-to/build-a-solid-zigbee-mesh
If these shades are zigbee end-devices, I would recommend adding between 6-10 zigbee repeaters that are positioned throughout your house.
I had a similar experience that seemed to resolve itself after powering down the hub, removing the power and Lan cables for a few minutes whilst swapping antennas.
Whether it was the extended power removal or the antenna swap that helped, I'll never know. 
Thanks for the reply. All of the Zigbee shades are battery-powered or/solar panel-powered end devices. Most are 100% charged as they were fully charged when installed, and the last battery reading in the hub shows 100%. One of the shades is about 9 feet from the hub and still won't connect. It is not a case of the distance from the hub or signal strength being a factor. I have a 4-pack of THIRDREALITY ZigBee Smart Plugs. I planned to use a repeater, but zero connections make me believe it is a hub problem. How do you reach a live support person?
I disconnected the hub for 30 minutes as stated in How To Build a Solid Zigbee net dco, (which said wait 20 minutes), and it there was no change. Bummer 
30 end-devices with no repeaters is a recipe for the type of symptoms you have described. My experience with several large zigbee mesh networks (100-150 total devices) indicates that a good ratio of repeaters to end-devices is about 1:3 - 1:4.
This procedure relies on zigbee devices entering panic mode. Don't know if this is long enough for your shades to enter panic mode. And, the absence of repeaters may make this process less likely to work.
For 30 end-devices, you need between 6-10 zigbee routers. So two of the 4-packs you described. I would recommend the following steps:
- Pair your zigbee repeaters.
- Make sure the mesh remains stable and performant for 24 hours. Reposition repeaters if necessary.
- Factory reset, and re-pair your shades. There is no need to delete the devices. They will pair back with their existing device IDs and names.
Anything is possible; although my experience biases me against that possibility.
There is no "live" support. Hubitat support is active on the community. In addition, if you are within the warranty period, you can submit a warranty case at [Warranty – Hubitat Support].
You can try changing the ZigBee channel, 25 seems to be a good choice (but it will depend on your RF environment) , and re-pairing your blinds.
As @aaiyar said, there is no detrimental issues if you don't delete them, then the hub reacquires the devices in their original ID assignments.
The Tuya USB repeaters are nice as you can easily position them out of sight.
AliExpress item 1005007798924350
These are my favorites.
I have 18 Smartwings ZigBee shades. My experience (with lots of ZigBee repeaters) is that trying to operate more than five of them simultaneously will leave a few missing the command. Staggering them in groups by a second or two resolves that. Beyond my pay grade but my assumption is that dialing back the demand on the ZigBee network just a bit is an acceptable solution.
Staggering is a good idea, and would certainly help in ensuring that every device capable of receiving a command, receives it. But it will not resolve issues with devices dropping off the mesh. Also, pertinent to staggering, "Command Retry" now supports shades/blinds.
Sadly, AFAICT (from the zigbee2mqtt docs), the firmware in zigbee shades/blinds doesn't support zigbee group messaging. Would be nice if they did.
This works but it is not particularly satisfying. For shades there is a 60 second delay to allow for up/down cycle times. I recently had an interaction with @bravenel about group messaging for Smartwings but it turns out that is on Smartwings to enable. It is not something that Hubitat can implement.
Correct. The zigbee firmware in the blinds/shades doesn’t support group messaging.
Thanks to all for your support. I installed four Third Reality Smart Plugs as Zigbee Repeaters. They all installed flawlessly and are active on the hub. They are forming a nice backbone with a direct route to the Habitat hub and one or two links to other repeaters. From the Habitat Zigbee settings, I rebuilt the Zigbee network. Why are the repeaters not picking up the Zigbee shades?
What exactly do you mean by this?
