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WebREPL Connection lost (EOF) in Thonny 3.3.3 ESP8266 MicroPython v.1.14

See original GitHub issue

I am using ESP8266 running the latest MicroPython v1.14. I have configured WebREPL with a password and can connect to it with the “official” WebREPL client for MicroPython (webrepl.html). The same does not work in Thonny, I have the following messages, trying to connect, then Stop/Restart backend couple of times as suggested by the first error message, also tried to turn on/off ESP8266 and restart Thonny:

MicroPython v1.14 on 2021-02-02; ESP module with ESP8266

Type "help()" for more information.
>>> 
-----------------------------------------------------------------------------------------------------------

WebREPL connected

Connection lost (EOF)

Use Stop/Restart to reconnect.

-----------------------------------------------------------------------------------------------------------
Exception in thread Thread-2:
Traceback (most recent call last):
  File "C:\Program Files (x86)\Thonny\lib\site-packages\websockets\protocol.py", line 827, in transfer_data
    message = await self.read_message()
  File "C:\Program Files (x86)\Thonny\lib\site-packages\websockets\protocol.py", line 910, in read_message
    return frame.data.decode("utf-8") if text else frame.data
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x80 in position 0: invalid start byte

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "C:\Program Files (x86)\Thonny\lib\threading.py", line 926, in _bootstrap_inner
    self.run()
  File "C:\Program Files (x86)\Thonny\lib\threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "C:\Program Files (x86)\Thonny\lib\site-packages\thonny\plugins\micropython\webrepl_connection.py", line 54, in _wrap_ws_main
    loop.run_until_complete(self._ws_main())
  File "C:\Program Files (x86)\Thonny\lib\asyncio\base_events.py", line 587, in run_until_complete
    return future.result()
  File "C:\Program Files (x86)\Thonny\lib\site-packages\thonny\plugins\micropython\webrepl_connection.py", line 66, in _ws_main
    await asyncio.gather(self._ws_keep_reading(), self._ws_keep_writing())
  File "C:\Program Files (x86)\Thonny\lib\site-packages\thonny\plugins\micropython\webrepl_connection.py", line 123, in _ws_keep_writing
    await self._ws.send(payload)
  File "C:\Program Files (x86)\Thonny\lib\site-packages\websockets\protocol.py", line 555, in send
    await self.ensure_open()
  File "C:\Program Files (x86)\Thonny\lib\site-packages\websockets\protocol.py", line 812, in ensure_open
    raise self.connection_closed_exc()
websockets.exceptions.ConnectionClosedError: code = 1006 (connection closed abnormally [internal]), no reason


-----------------------------------------------------------------------------------------------------------------
Exception in thread Thread-2:
Traceback (most recent call last):
  File "C:\Program Files (x86)\Thonny\lib\site-packages\websockets\protocol.py", line 827, in transfer_data
    message = await self.read_message()
  File "C:\Program Files (x86)\Thonny\lib\site-packages\websockets\protocol.py", line 910, in read_message
    return frame.data.decode("utf-8") if text else frame.data
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x80 in position 0: invalid start byte

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "C:\Program Files (x86)\Thonny\lib\threading.py", line 926, in _bootstrap_inner
    self.run()
  File "C:\Program Files (x86)\Thonny\lib\threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "C:\Program Files (x86)\Thonny\lib\site-packages\thonny\plugins\micropython\webrepl_connection.py", line 54, in _wrap_ws_main
    loop.run_until_complete(self._ws_main())
  File "C:\Program Files (x86)\Thonny\lib\asyncio\base_events.py", line 587, in run_until_complete
    return future.result()
  File "C:\Program Files (x86)\Thonny\lib\site-packages\thonny\plugins\micropython\webrepl_connection.py", line 66, in _ws_main
    await asyncio.gather(self._ws_keep_reading(), self._ws_keep_writing())
  File "C:\Program Files (x86)\Thonny\lib\site-packages\thonny\plugins\micropython\webrepl_connection.py", line 123, in _ws_keep_writing
    await self._ws.send(payload)
  File "C:\Program Files (x86)\Thonny\lib\site-packages\websockets\protocol.py", line 555, in send
    await self.ensure_open()
  File "C:\Program Files (x86)\Thonny\lib\site-packages\websockets\protocol.py", line 812, in ensure_open
    raise self.connection_closed_exc()
websockets.exceptions.ConnectionClosedError: code = 1006 (connection closed abnormally [internal]), no reason


-----------------------------------------------------------------------------------------------------------------

My environment: Windows 10 Home, Thonny 3.3.3, Python 3.7.9 (32 bit) Tk 8.6.9 COM6 connection in Thonny works as expected, I can connect to ESP8266, run Python code and upload files, but I would like to use WebREPL if possible.

Issue Analytics

State:
Created 3 years ago
Comments:9 (3 by maintainers)

Top GitHub Comments

1reaction

aziubincommented, Feb 20, 2021

Verified that Thonny 3.3.4 can open MicroPython v.1.14 WebRepl (ESP8266).

0reactions

segankucommented, Feb 20, 2021

It appears that Thonny 3.3.4 + MicroPython 1.14 are still having problems when a remote WebREPL connects:

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
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I see this issue is now closed, so maybe I’ll start a new thread. I was kinda thinking these issues were probably somewhat related.