green led blinking after plugging in. flash.py/recover.py stuck

[pandaexpress-red]

Describe the bug

I went through flash.py, recover.py to make panda work.
Now whenever I plug in it shows green led blinking, so I tried 4 things below. Help to make this work would be greatly appreciated.

1. run flash.py which hung at
   scons: Reading SConscript files ...
   scons: done reading SConscript files.
   scons: Building targets ...
   scons: `board' is up to date.
   scons: done building targets.
   INFO: connecting to panda 18000f001051313338343730
   flashing 18000f001051313338343730
   flash: unlocking
   flash: erasing sectors 1 - 1
   flash: flashing
   flash: resetting

2. run panda.can_recv() which says me reflash

from panda import Panda
p = Panda()
INFO: connecting to panda 18000f001051313338343730
p.can_recv()
Traceback (most recent call last):
File "", line 1, in
raise RuntimeError(f"{desc} packet version mismatch: panda's firmware v{panda_version}, library v{lib_version}. Reflash panda.")
RuntimeError: CAN packet version mismatch: panda's firmware v0, library v4. Reflash panda.

3. run recover.py which is hung at
   scons: Reading SConscript files ...
   scons: done reading SConscript files.
   scons: Building targets ...
   scons: `board' is up to date.
   scons: done building targets.
   putting 18000f001051313338343730 in DFU mode

4. run reflash_internal_panda.py
   FileNotFoundError: [Errno 2] No such file or directory: '/sys/class/gpio/gpio124/direction'

OS Version

Ubuntu 22.04

openpilot version or commit

No response

Additional info

No response

[adeebshihadeh]

Closing as this isn't a bug - check out our Discord instead.