u/Emotional_Umpire_113

Mcu unable to connect on Flsun Q5

Hello everyone,

I desperately need some help to make this work because i am starting losing hope.

I am trying to install Klipper on my stock flsun q5 (MOBO MKS Robin Nano v1.2) with a raspberry pi zero 2w, but there is no way to avoid the MCU unable to connect error.

I tried to set the serial both by id and by path, i changed the usb cable, but every single time the log looks like this:

mcu 'mcu': Wait for identify_response

Traceback (most recent call last):

File "/home/justnicottero/klipper/klippy/serialhdl.py", line 75, in _get_identify_data

params = self.send_with_response(msg, 'identify_response')

File "/home/justnicottero/klipper/klippy/serialhdl.py", line 271, in send_with_response

return src.get_response([cmd], self.default_cmd_queue)

~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/home/justnicottero/klipper/klippy/serialhdl.py", line 331, in get_response

self.serial.raw_send_wait_ack(cmds[-1], minclock, reqclock,

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

cmd_queue)

^^^^^^^^^^

File "/home/justnicottero/klipper/klippy/serialhdl.py", line 263, in raw_send_wait_ack

self._error("Serial connection closed")

~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/home/justnicottero/klipper/klippy/serialhdl.py", line 68, in _error

raise error(self.warn_prefix + (msg % params))

serialhdl.error: mcu 'mcu': Serial connection closed

Can someone help me in this battle that last since 3 days ago?

Thanks!

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