No longer working with CircuitPython 2.2.3

[robmarkcole]

Updated my trinket M0 to CircuitPython 2.2.3 and the jupyter integration is no longer working. In my logs I get:

[I 20:19:36.190 NotebookApp] Saving file at /Documents/Github/Useful-python/Mircropython/Micropython with Adafruit M0 7-2-2018.ipynb
DEBUG:jupyter_micropython_kernel.kernel:Opening MicroPython board connection on port: /dev/cu.usbmodem14341 baud: 115200
Traceback (most recent call last):
  File "/anaconda3/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/anaconda3/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/anaconda3/lib/python3.6/site-packages/jupyter_micropython_kernel-0.1.0-py3.6.egg/jupyter_micropython_kernel/__main__.py", line 22, in <module>
    IPKernelApp.launch_instance(kernel_class=make_micropython_kernel(port, baud))
  File "/anaconda3/lib/python3.6/site-packages/traitlets/config/application.py", line 657, in launch_instance
    app.initialize(argv)
  File "<decorator-gen-123>", line 2, in initialize
  File "/anaconda3/lib/python3.6/site-packages/traitlets/config/application.py", line 87, in catch_config_error
    return method(app, *args, **kwargs)
  File "/anaconda3/lib/python3.6/site-packages/ipykernel/kernelapp.py", line 457, in initialize
    self.init_kernel()
  File "/anaconda3/lib/python3.6/site-packages/ipykernel/kernelapp.py", line 368, in init_kernel
    user_ns=self.user_ns,
  File "/anaconda3/lib/python3.6/site-packages/traitlets/config/configurable.py", line 412, in instance
    inst = cls(*args, **kwargs)
  File "/anaconda3/lib/python3.6/site-packages/jupyter_micropython_kernel-0.1.0-py3.6.egg/jupyter_micropython_kernel/kernel.py", line 42, in __init__
    self._board.enter_raw_repl()
  File "/anaconda3/lib/python3.6/site-packages/jupyter_micropython_kernel-0.1.0-py3.6.egg/jupyter_micropython_kernel/pyboard.py", line 204, in enter_raw_repl
    raise PyboardError('could not enter raw repl')

[ladyada]

@robmarkcole hiya do you know when the last version it worked?
@tdicola on tidyday, please check this issue, and fix so circuitpython is functional again

[robmarkcole]

Hi it worked with whatever firmware the Trinket M0 shipped with (did't ever check version) - I updated the firmware for the first time yesterday

[tdicola]

I can't repro the issue, it seems to connect fine to a Trinket M0 with 2.2.3. Here's one out of the box with 2.0:

And the same upgrade to 2.2.3:

You might try a different USB cable to make sure you're getting a good connection to the board. Also try manually resetting the board and make sure there isn't a pre-existing main.py that might be running and spamming unexpected output.