Strange… I have four of these and they have been the most reliable zigbee devices on my ZHA network, no matter what channel or settings
Same issue here, SML001 loosing Connection. I also have a network with many Router devices. Before it was running on Z2M without any issue. And Yes I can switch back, but would give the Official Skyconnect Dongle and ZHA a go.
Same issue with ZHA here. Some devices drop out of the network.
I also have a SkyConnect dongle, so I wanted to give ZHA a go.
Z2M had no issues (ZZH dongle).
Got 110 devices, and about 60% are router devices.
I´m using the same channel as I did on Z2M.
Is it an issue with SkyConnect, ZHA, or a combination?
There is something going with ZHA - I’ve noticed that simply restarting ZHA solves a lot of glitches.
Tried… Not working 
It turned out @Hedda was right all along… at least in my case.
There are two version of the Sonoff Zigbee dongle.
The ZBDongle-E and the SkyConnect dongle I used both have the same chip which is newer and supposedly better, but it still has some bugs.
I switched to the older ZBDongle-P controller and everything worked great since.
That Zigbee guide he linked to was also very useful, but initially I didn’t read it as carefully as I should have done.
When they say that Zigbee is very sensitive to interference, they really mean it.
Some steps that turned out to have a significant impact on the Zigbee signal for me were:
- Use a long USB extension cable to place the Zigbee adapter away from interference and obstacles.
- Try to place the Zigbee adapter at some distance away from walls, ceilings, and floors.
- Try to place your Zigbee adapter away from Wi-Fi access points or sources of WiFi.
- Place Zigbee adapters far away from electrical/power wires/cables, power supplies, and household appliances.
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Yeps, 2024 still same challenges with SML021, also with ZHA but on the Yellow.
No problems on Deconz at all. And SML022 works like a charm on ZHA+Yellow…
Weird, have tried the usual suspects, wifi separation channels/physical, different better shielded USB extension cable on the Deconz dongle that also sits in the my Yellow. When I moved from RP4+Deconz+Phoscon to Yellow, I kept my Deconz dongle and run two Zigbee networks at the moment. Wanted to see how that panned out. Also saving me from re- pairing the many different bulbs in our home…
So slowly moving from Deconz to the built in Yellow Zigbee.
So far it seems a bit weak on radio (only how I experience it, haven’t any measuring or data on it.)
(Deconz=ConbeeII)
I also have problems with ZHA and Zigbee. I am loosing devices, but also routers (!). Even the ones close to the coordinator.
I’ve added an even longer cable to the SkyConnect. And my Zigbee network is quite evenly throughout the house. Routers the furthest away (garden) is very stable) but the Aqara T1 LED strip (3-4 meters away from the Skyconnect) is loosing connection (as some battery powered devices; which are relativly close to routers).
I don’t know what to do…
I had the same devices (with less routers) when I was on Homey, and that was very stable).
This is my network:
I see that some (battery) devices are unavailable because of routers being unavailable. But there are other routers nearby. Why isn’t it picking up on that one?
Some time later, this is the status:
- I have extended the distance from my SkyConnect even further: 1 meter away from usb ports.
- Wifi is dedicated on channel 1.
- ZHA is dedicated on channel 25.
- There 27 routers and 23 end point devices.
My Aqara LED strip, my aqara T1 (no neutral) and a tuya temperature, an aqara temperature and an aqara door sensor is falling out from the network.
I shut down my HA-server for 45 minutes and powered it back on the rebuild the Zigbee network. The unavailable Aqara T1 (no neutral) who was unavailable was back available, but later that day it was unavailable again.
I dont have a clue what is going on and why routers (!) are falling from the network?! What is there left to do to get a stable network?
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