For whatever reason, I did manage to do so the following way (I have no clue why this works, I've just seen it works accidentally and continued to it the same way):
- Disconnect everything.
- Connect the dongle to the computer, and connect the router to the dongle except for the Rx wire (for whatever reason, but otherwise the router won't start with dongle connected).
- Connect the router to the power source, and when it starts blinking its lights, quickly connect the Rx wire and start the console as fast as possible.
- You'll see the option selection countdown. Press 1 while moving at the speed of light.
- Voila.
This is tough to perform as you have to act very quickly. The whole connecting things and pressing buttons sequence has to happen in 2-3 seconds. You can attach so buttons to the wires to make it simpler.
https://forum.openwrt.org/t/bricked-xiaomi-mi-wifi-router-3-stuck-in-in…
De lehet csak scifi. :)