Sonoff zbminil2 strange behavior

[vladx (L>)]

Hi,

This is a bit offtopic (because it is for specific hw product and probably nothing to do with HA) but since lots of us are using the device, maybe someone will have an idea here

… excerpt from a mail sent to Sonoff support …

Hi,

I have couple of zbminil2 devices in my house and I plan to have more because I like it because of the size and simplicity. However I have some issues with it

With my electrician we used the wiring from the official documentation like this
ZBMINI-L2 - SONOFF Official

In my house majority of the switches for the lamps are so called two way switches (when I can manage the same lamp with two switches, when I turn off the first I can turn on with the second and vice versa (DPDT switch?). My goal is to keep the manual function of the switches, but I want to add automatic functions as well (e.g. event based automation), so this is why Sonoff zbminil2 chosen for this.

We’ve installed three of these devices so far and two of them (one is more frequently) having this issue

It is ok for a while (even for weeks), so automatic functions are working and you can still use manual method, but after a while mostly after a manual switch the zbmini starts cycling between on and off state (lamps blinks). If I’m not fast enough to stop it, after 5 blinks, it resets itself (and the connected smart bulbs too) so I have to disassemble the switch, re-pair zbmini (and the bulbs). I even thought this is some kind of HW failure, so I’ve replaced the most problematic one with a new one, but after maybe 1 month, the issue above re-appeared.

Can you help me in this to solve this issue and I can continue equip my other switches with zbmini?

Thank you
Laszlo

[fleskefjes]

Seems others have had similar problems with Sonoff devices, check the threads and see if you can find any pointers. I don’t have any experience with Sonoff devices myself but to me it sounds like it might lose connection to your Zigbee network and therefore reset? How is your network set up, do you have enough routers, using an extension cable and so on?

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[vladx (L>)]

I think this is completely different with this ‘blinking’ behaviour but thank you for your answer. I hope someone -even sonoff official support- will come up with an actual solution

[Lectere]

I have a lot of Sonoff, and I love it.

I have around 30+ zigbee things in my HA setup up, one ZBMINIL2.

I’ve replaced one because it suddenly stopped working, after 6 months or so, I got a new one, and that one had ‘ghost’ behavior.

After installing the new one, paired it, and everything worked OK. But after 10 hours, it started switching off and on all of the sudden. In the middle of the night…

So that’s the second one that died on me…

[smitcher]

I have a ZBMINIL2 that has started doing exactly the same. It will work perfectly for a while, weeks even, and then it can do one of the below:

1. You switch light on and it comes on fine but then it cannot be switched off with the same switch 1 minute later
2. You switch it on and it flashes on-off-on and again it cannot then be switched back off with hte same switch
3. You switch the light on and it starts flashing on and off 5 times and then still shows as connected in Z2M but cannot be controlled from there, from HA, from the switch or from a remote ZB switch via a Node Red flow…

With 1 and 2 above it loses local switch control but can still be toggled on and off with Z2M, HA and remote ZB switch via Node Red…

I removed the bulbs from both lights so tha the ZBMINIL2 had no neutral path via the bulbs and after 30 minutes put the bulbs back in and it rejoined the network and worked fine again for another week of so…

I know someone is going to suggest bad wiring, bad signal to Z2M or wrong switch mode but all 3 have been checked.

Due to only 3 wires being available to the ZBMINIL2 it is wired as Lin-Lout-SW2(L) and is in toggle mode whereas all my others have the switch between S1-S2 and work flawlessly even though their signal is much less than this faulty one…

They are all on the same, latest firmware and i’ve swapped them around and the same thing ends up happening with a new one in this location.

So it looks to me like there is an inherent problem with this ZBMINIL2 or the firmare 1.0.14 when in L-SW2 toggle mode…

Did you ever resolve this or anyone have any other thoughts?

[vladx (L>)]

Hi,

Are you also have two-way switches plus three-phases in your house? To be honest, this was the only scenario where I found these strange behaviors and at the end it became clear the two phases I had to use for sonoff (one from the original switch and another one from the switch next to it) was two different circuit, so zbmini got 400V which was tolerated for a while, then it is not

Other places where I have ‘normal’ switches, or the two phases are the same circuit, I have no problem at all.

L: