I have 2 shelly Plus 1 that were loosing connection regularly.
It happened that sometimes when the router is changing the wifi channel (after a new device pops in, like a smartphone) the Shellies were not “receiving the info” and were becoming unresponsive.
After that, rebooting the router (or hotspot) or power off/on the Shelly was restoring the connection. Any of the two is working. So the shellies were not hanged/frozen.
The work around for me was simply to fix the wifi channel on the router, so it does not change anymore.
Since then, no issues anymore of Shelly becoming unresponsive.
I thought sharing this might help some of you…
Thanks for the tip, I’m having issues with my Shelly Plus S that they become unresponsive at all, not through the app, not through the web interface, only solution is factory reset.
Last time I updated my unifi router software so they rebooted and after that all of them became “dead”.
But maybe this is related to the channel changing after a reboot of my APs.
Going to give this a try.
Thanks a lot for this tip. I have the same issues (4 x Shelly 1PM devices, connection is constantly lost after a day or so and powering off and on the device helps), I also have an Asus router. I set a fixed value to my 2.4 channel. I will let you know if that helped.
FWIW … I had issues with a of couple Shelly devices constantly dropping connection, and so I set my nearest wifi AP/router to a fixed 2.4GHz channel, which seems to have resolved the issue.
Incidentally, my wifi AP/router (and the Shellys in question) was just in range of my neighbour’s wifi, so channel hopping was inevitable.
I have the probelm that shelly’s getting unavailable, when internet connention is gone. It also could be possible the the device gets unresponsive completly until i powercycle it. I had problems with my modem, so network and router works fine, but no internet. In this case the problem can be reproduced. I have read that Shelly devices need a ntp server to work proberly (Wie kann man Shelly Geräte ohne Internet benutzen? :), so i entered a local ntp server now, and test that. But pretty sure that this will not solve the problem.
another help for perople with only one Accesspoint could be to disable wifi routing:
Also I have the same problem with a Shelly 2PM. I use it for a window blind. Right now I have just one for testing and the plan is to put it on all windows. But the WIFI drops make me second guess that idea.
I tried to tweak my WIFI. Set fixed WIFI channels. Replaced the router / AP
In the Shelly settings I disabled the roaming and the eco mode.
I also tracked the WIFI signal (.rssi entity) but that also didn’t help to figure out the problem.
It stays in the network for 2-3 days without problems and suddenly it drops a few times within one hour.
I’ve read that many lose the wifi connection with the shelly PM and shelly EM.
I have to say that I have had that problem with them. Researching, I’ve come up with the solution.
There is a capacitor that needs to be replaced, its value is 16V and 100UF.
I have had the problem on 4 devices and by changing the capacitor they have fixed the connection problems.
I have a Shelly Plus 1 that often becomes Unavailable in Home Assistant at various times of the day. It is at the end of the garden, closer to neighbours’ APs and the RSS is -80dBm at best. However, it very rarely loses connection with the Shelley Cloud. I think what is happening is that the device occasionally loses wi-fi connection but that the Shelly Cloud connection is robust and recovers when wi-fi connection is resumed. Home Assistant seems not to be as capable or forgiving.
Anyone had any updates on this?
I have 2 Uni’s connected using static ips. They are connecting to my HA Server using CoIoT. They both have the same issues with intermittent disconnecting and reconnecting and i cant for the life of me figure out why
Has anyone found a solution for this? I have been using the Shelly Plus Plug US to monitor power usage on freezers, but recently found that they were dropping and becoming unavailable. After an undetermined amount of time, they would reboot completely, but would generally be in an off state for several minutes during this time. I had set a timer to auto on them, but that doesn’t seem to really help.
After my YoLink would report troubling temperatures in my freezers, I realized it was related to these devices. I contacted Shelly and was told that it was being reset on a timer, but my HA is not trying to set a timer on these devices that I could ever find. It’s currently 1:30am and another one of these turned off, but this time on my pellet stove and smoked up the entire house.
When I go to check the switch in HA, there is some troubling history that looks like this:
Unfortunately, adding the outbound websocket doesn’t completely eliminate the issue. The switch may still turn off, but it appears that it is only off for a few seconds (28 in this case).
I’m also having this issue.
In my case I have 2 Shelly Pro 4PM. Both beside each other, same distance to the router, same network, same firmware, same configuration overall.
Yet one of them keeps going unavailable (every 10min) for short periods and then back available. It’s spamming the logbook.
It doesn’t seem to be device specific related. Rather an integration’s issue.
I updated lastly my instance from 2024.5 to 2024.12.
And this problem wasn’t present before.
So something must have changed in the integration between that period.
Ive also experienced problems in past one month or so. I have about a dozen shelly devices with three EMs but one keeps losing connection. Ive tried everything suggested but no joy. Its not just a HA problem, its they totally lose the network.
I have a Unifi network pretty much set up as default. Perhaps something changed?
Yes, I think something is very much off with these devices. I’m a bit concerned since I had been using them with our freezers (we have a few because we have cattle). I also had this disconnect from the pellet stove and smoke up the whole house in the middle of the night. Yesterday, the one that is used with a humidifier lost it’s mind. I’m really not trusting these anymore and looking for alternatives.
