Having USB TTL/UART around is always a good idea. But you probably need to convert yours to mi wifi mini (at least temporarily) to be able to use it again...
Peoples from 4PDA have a few tutorials for that (use Google translate):
Having USB TTL/UART around is always a good idea. But you probably need to convert yours to mi wifi mini (at least temporarily) to be able to use it again...
Peoples from 4PDA have a few tutorials for that (use Google translate):