Since June I have asked for information about firmware enhancements for the White Series Fan Switch. There has not been any firmware updates since it was released. Much like the original 1.0 Dimmer firmware, the fan switches go offline on the thread network and do not recover. Ever. They require an air gap pull to get back on the network. When the matter server (HA) is restarted, over a short period (less than 48 hours) all of the fan switches go offline and never recover. It is like as their addresses expire or their subscription fails, they simply will not come back online. They don’t all go offline at once. Most of them will come back up immediately after a restart of the matter server but will start dropping off 1 at a time over 48 hours.
I have 128 matter devices across multiple brands (about 90 of the devices are inovelli) and the vtm35 devices are the only ones that have this problem.
Is there a firmware update in the works to get them up to matter 1.4. It would seem from a commissioning, subscription … perspective, they all should work about the same but something is different with the fan switches. The new On/Off don’t do this and those have received multiple firmware updates.
This has been documented in multiple threads in the forum. Would like to get this resolved as anything that requires a physical intervention (power cycle or air-gap) is a pretty irritating issue especially when you end up being out of town for an extended period of time and can’t access the devices.
@EricM_Inovelli @Kaleb_Inovelli
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I should have specified, my post was about the VTM-35 wall switch not the canopy.
@Kaleb_Inovelli @EricM_Inovelli can we get a comment on the firmware for the in wall fan switch? I have brought this up in multiple threads, created this thread specifically to address this and would like to know what is in the works. The VTM35 when it goes offline on the thread network, never comes back and it isn’t resilliant though a matter server / border router reboot. None of the other inovelli or 8 other vendors products I have exhibit this problem so I’m pretty sure it is related to firmware on the switch as all 11 of them that I have do this.
Hi @bigDvette,
Thank you for continuing to raise this and for taking the time to document what you’re seeing.
To be transparent about where things stand: about a month ago, we were expecting the Silicon Labs Matter 1.5 SDK to be released “within about a month,” so we made the decision to hold off on an update rather than invest in a 1.4 based firmware that would quickly become out of date. Upgrading SDKs is quite an expensive process, so it makes more sense for us to wait for the newest one to release.
Since we were initially told it would be within a month, we are now expecting it any day now. While that doesn’t make the current experience any less frustrating, it is the reason you haven’t seen a firmware release yet.
Once the 1.5 SDK is released and validated, firmware stability for Thread reconnection and recovery is one of our top priorities for the VTM35. We will share updates as soon as we have more information for you.
Please let me know if you have any additional questions.
Thanks again for your patience on this.
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HI Kaleb - I assume that this would apply to all firmware updates for the White Series? And it looks like the Silicon Labs Matter 1.5 SDK was released yesterday: Simplicity SDK Version 2025.12.0 - Release Notes (Jan 22, 2026) | Summary | Simplicity SDK Release Notes | v2025.12.0 | Silicon Labs
Assuming that’s what you were waiting for, does that mean your firmware upgrade can be released? Maybe sometime in the next week?
Thanks @Kaleb_Inovelli . Put me on the beta list when you get that going and need testers.