Thonny breaks remote WebREPL connections

Thonny breaks remote WebREPL connections, and remote WebREPL connections break Thonny. It seems ideal that these should be able to coexist somewhat … maybe auto-off the raw-paste-mode when a remote connection attaches?

If Thonny is connected (via Socket), and a WebREPL session connects, that WebREPL session will be non-functional. Additionally, Thonny’s REPL session will become non-functional, crashing with any input.

Thonny 3.3.4 and MicroPython 1.14.

ERROR   thonny.plugins.micropython.backend: PROBLEM WITH THONNY'S BACK-END:
Traceback (most recent call last):
  File "C:\Users\montg\AppData\Local\Programs\Thonny\lib\site-packages\thonny\plugins\micropython\backend.py", line 340, in _handle_normal_command
    response = handler(cmd)
  File "C:\Users\montg\AppData\Local\Programs\Thonny\lib\site-packages\thonny\plugins\micropython\backend.py", line 636, in _cmd_get_globals
    "{name : (__thonny_helper.repr(value), id(value)) for (name, value) in globals().items() if not name.startswith('__')}"
  File "C:\Users\montg\AppData\Local\Programs\Thonny\lib\site-packages\thonny\plugins\micropython\backend.py", line 549, in _evaluate
    out, err = self._execute(script, capture_output=True)
  File "C:\Users\montg\AppData\Local\Programs\Thonny\lib\site-packages\thonny\plugins\micropython\backend.py", line 505, in _execute
    self._execute_with_consumer(script, consume_output)
  File "C:\Users\montg\AppData\Local\Programs\Thonny\lib\site-packages\thonny\plugins\micropython\bare_metal_backend.py", line 708, in _execute_with_consumer
    self._submit_code(script)
  File "C:\Users\montg\AppData\Local\Programs\Thonny\lib\site-packages\thonny\plugins\micropython\bare_metal_backend.py", line 567, in _submit_code
    self._submit_code_via_raw_paste_mode(to_be_sent)
  File "C:\Users\montg\AppData\Local\Programs\Thonny\lib\site-packages\thonny\plugins\micropython\bare_metal_backend.py", line 657, in _submit_code_via_raw_paste_mode
    self._raw_paste_write(script_bytes)
  File "C:\Users\montg\AppData\Local\Programs\Thonny\lib\site-packages\thonny\plugins\micropython\bare_metal_backend.py", line 691, in _raw_paste_write
    raise AssertionError("Unexpected read during raw paste: {}".format(data))
AssertionError: Unexpected read during raw paste: bytearray(b'p')
term: Exception in write() method, deactivating: OSError: [Errno 104] ECONNRESET
�

It’s obviously not a huge deal, and the easy work around is to not try to type in two places at the same time.

Thank you so much for the awesome product you’ve created here. It’s really something incredibly special! -monte

[aivarannamaa]

Would it be possible/feasible/reasonable to add an option to disable to RAW mode REPL? Presumably it would be slightly slower, but it might be a worthwhile tradeoff in some instances.

Actually, there might be a way. I don’t know how I forgot about it before. See https://github.com/thonny/thonny/wiki/MicroPython#advanced-configuration and try submit_mode = paste.

[aivarannamaa]

@seganku, no, Thonny is not supposed to open a WebREPL connection when it is configured to use serial. If it happens like this, then it is a bug. I’ll check later.