How to recover dead Nedis smart plugs after OTA? BK7231T help

Hey everyone. I've been happily using my three Nedis smart plugs with HomeAssistant for about a year. I then tried to do an OTA upgrade but it seems to have broken something. Either way the smart plugs will not boot up anymore so I think I will need to reset and/or manually UART firmware again. Is there any way of not needing to solder and UARTing? As in resetting the firmware? The firmware write did seem to work, it then rebooted but never really came up again...

Maybe they are back to AP mode?

That was my first guess but unfortunately not.

Try doing 5 quick power off/on cycles.

It worked! What did I just do?

Thank you!

It is called safe mode, we have an try in FAQ for that:
https://github.com/openshwprojects/OpenBK7231T_App/blob/main/docs/faq.md