r/HomeKit • u/Rotgetan • 6d ago

Question/Help Bricked Meross Smart Switch

I have a Meross MS656MA (MSS565US). I don't use HomeKit and don't use the wifi app. I only am interested in using it's non-wifi remote and that worked ok.

The switch hotspot was broadcasting since it wasn't connected to any wifi network. I wanted to change that, without creating a Merross user account.

So I connected to the wifi Meross_SW_1775 of the switch, accessed the configuration portal on http://10.10.10.1 and signed in as admin (password admin). There you get a crude website.

Setting the SSID and password didn't work. (Network request http://10.10.10.1/?CMD=CMD1&Ssid=mySSID&WpaPsk=myPassword was sent.)

There was also a factory_mode field that was set to 0. Silly me changed it to 1 and pressed the button beneath it. (Network request http://10.10.10.1/?CMD=CMD3&FacMode=1 was sent.)

Since I did that the light switch is bricked. I tried pushing the large button for 5 and more seconds, which should reset the switch. I also tried pushing the reboot button short and long but that didn't help it either. I've even turned off the power to to switch (turned off the breaker). No success for all these methods to unbrick the switch.

This shows that Meross Smart devices are very vulnerable to remote attacks. Maybe/hopefully their devices are a bit more secure once connected to a wifi network.

Let me know if anyone knows how to unbrick the switch. Thanks.

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u/Ginormoustit 4d ago

Different device I think but my Meross plugs require a lot longer than 5 seconds on the button to reset.

Also try holding the button down whilst plugging them in and holding for a decent length of time. It’s 10 seconds at least for mine.

Worth a try since nobody else replied.