Could anyone tell me is Hubitat going to update the hub to Zigbee 4.0 and Suzi? because I'm sick of my devices dropping off my zigbee network, its mainly one of my zemismart curtains motor it will work 3, 4, or 5 times then I reconnected it again then it will work for a few days again and then I will have to repeat the cycle again, I have got 3 more zemismart curtain/blind motors they work ok, as anyone got any ideas please.
I am not aware of any Zigbee devices or hubs that currently support the new 868 MHz frequency band...
Do you have enough mains-powered Zigbee devices to serve as routers (repeaters) for your Zemismart blinds?
The community driver has a Ping() command - what are the round-trip times for each of your curtain motors?
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Hi, Thank you for your information, I have zigbee bulbs, plugs, zigbee Dana door lock powered light switch and a powered zigbee present sensor, there is no Ping command on the driver.
If you are using the community Zemismart Zigbee Blind driver, the latest version is 3.6.0 - 2025-09-14. You can update it manually.
Are your Zigbee bulbs (typically serving as repeaters) always powered on?
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Hubitat staff rarely discuss their future plans publicly and Zigbee 4.0 would require a new hardware revision of the hub.
So I wouldn’t expect to hear much about it until they are ready to announce the next gen hub’s release.
If you really want to keep tabs on upcoming new hub hardware, you can periodically search https://fccid.io.
That’s the US Federal Communications Commission’s publicly accessible website for reviewing documents related to the certification of regulated devices that manufacturers are legally required to submit before sale on the US market.
We would probably see evidence of a new hub there anywhere from a couple months to a year or more before it’s released.
But I agree with @kkossev that you probably shouldn’t plan to wait for zigbee 4.0 devices and a new hub if you’re having trouble with one or more zigbee devices now.
More details about your mains powered zigbee devices could help troubleshoot the underlying problem(s) causing erratic behavior with one of your shades.
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I have several of these too, while they dont drop off my network. They do require me to send multiple of the same command to get them to respond. While it’s all automated, i dont consider these to be quality devices and they will be replaced with smartwings as soon as i can afford them.
If you dont have a zigbee outlet or switch in the same room as them, i’d start there. It also cant hurt to make sure your wifi and zigbee I have good frequency separation. Finally hub > zigbee details > view device graph to make sure your mesh looks solid.
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Also, which hub he is using, firmware, single residence or apartment, where hub is located, proximity to the WiFi router would be helpful. I have around 200 Zigbee devices spread across 3 hubs and can’t remember the last time I had one drop off of the network.
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I've done what you said and they all are working at the moment, yes my bulbs are always powered on, thank you for your help, I will check back in a week or so to let you know if its solved the problem.
Simply changing the driver will most likely not resolve the connectivity issue with this problematic device. The goal of the driver update was to collect some data that shows the reliability of the Zigbee connection to the curtain/blind motor and how this changes over time.
For the problematic Zigbee device, configure an aggressive ping schedule - for example, every 10 minutes:
Run a manual Ping() and compare the RTT (round-trip time) values for this problematic device with the RTT values of the motors that work reliably. Are there any significant differences?
After 24 hours, review the device logs. Do you see any periods where the RTT (round-trip time) values are very high, or where timeout errors occur? Can you correlate the time when the connection to the motor was lost (rtt = TIMEOUT) with any other events occurring on the Zigbee network at the same time?
One of the most common reasons for similar connectivity problems is strong Wi‑Fi interference affecting only the specific area where the device is located. Just a few meters away everything may be fine -the signal issue can occur only at the exact spot where the motor is installed and nowhere else. Typically, such problems are mitigated by installing an additional repeater between the problematic device and the hub.
But first, let’s look at the numbers (the RTT values) for a period that includes the Zigbee network disconnection event.
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Hi, My hub is about 104cm away from my WiFi router, is that to close?
Further would likely be better. If it’s possible to get it a few feet further away at least to test, that would be great.
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Ok thank you.
The pair of Zemismart curtain motors I bought last month for the bedroom have been rock solid, and they have responded to every command so far. They open and close with scenes every time as they are supposed to automatically, as well as always responding from a Tuya Scene knob I have next to the window to control them manually.
The bedroom always used to be a Zigbee poor area, for some reason, but I think I finally have that solved with enough repeaters now since I no longer have any issues with Zigbee in the bedroom. I'm just about at the 30% repeater devices minimum on my Zigbee network now, it makes a big difference to have enough repeaters (not just a repeater between a specific device and hub).
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This is down a different track -- what kind of Zigbee bulbs are you using?
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I’ve chased down similar issues. Most often it’s a result of crappy powered outlets acting as routers. Generate a zigbee map and find the device which is primarily being used to route to the blinds. Pull it. Retest. Those Aeotec dedicated routers can solve a lot of issues. It’s worth picking one up.
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As far as I am aware, this isn't just a firmware update. I believe it will require all new hardware, both hub and devices. It will be years before you see any availability in available devices.
Maybe tell us about your Zigbee mesh. What devices (brand and model) besides the shades you have? How many of each? How many repeating devices vs battery devices do you have?
Maybe even a Zigbee graph screenshot?
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My Zigbee blinds are Smartwings...but I had all kinds of issues with failures. I can't swear for sure which thing fixed it...but turning DOWN the power on the radio is what many told me to do...and they work now. I'm mainly zwave...so this seemed strange to me. I think when they are all yelling to loud (repeaters) there are collisions or maybe just bleed over?
Somewhat like a town hall meeting in a large auditorium. The audience in the very back might be able to hear the speaker if they use a megaphone. However, that doesn't mean the speaker can hear their response. 
Often better to have a middle man who can hear both parties well enough without the use of a megaphones to relay the messages. Will take longer using this approach but at least the message won't be lost.
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Yes. There is a concept called talk-out and talk-back for two way RF links.
If you increase the talk out (turn up hub power) the end devices will hear the messages but the communications back to the hub might not be strong enough. So it generally isn't a great idea to increase talk out power if you can't similarly improve talk back power.
Physical distance between your WiFi router and your Hubitat hub is not the thing. Frequency differerence is much more critical. For example, my WiFi hub is locked to WiFi channel 1. The Hubitat C8 Pro is on Zigbee channel 25. That is about as far apart as I can get them frequency wise. My Zigbee mesh is solid and my devices are reliable.
If you are in proximity to other WiFi hubs or extenders, then one of those might be interfering with your Zigbee mesh. You can control your own equipment, but you can't control that of neighbors. In that case, perhaps a switch in Zigbee channels might help.
