Is microdot incompatible with the logging module?

[spierepf]

import logging

from microdot import Microdot
app = Microdot()

app.run(debug=True)

The program above fails with:

MPY: soft reboot
Network config: ('192.168.1.199', '255.255.255.0')
Starting async server on 0.0.0.0:5000...
Traceback (most recent call last):
  File "main.py", line 6, in <module>
  File "/lib/microdot/microdot.py", line 1316, in run
  File "asyncio/core.py", line 1, in run
  File "asyncio/core.py", line 1, in run_until_complete
  File "asyncio/core.py", line 1, in run_until_complete
  File "/lib/microdot/microdot.py", line 1266, in start_server
  File "asyncio/stream.py", line 1, in start_server
OSError: -203
MicroPython v1.26.0 on 2025-08-09; Generic ESP32 module with ESP32
Type "help()" for more information.

but succeeds if I comment out the import logging line:

MPY: soft reboot
Network config: ('192.168.1.199', '255.255.255.0')
Starting async server on 0.0.0.0:5000...

Does anyone know what OSError: -203 means?

[miguelgrinberg]

Microdot does not use the logging package, but it does not prevent you from using it yourself. And I do not know what the error code means, it is probably a code that is specific to the C libraries in the ESP32. Have you installed the logging library in your device? I don't think it is included in MicroPython. You can try using the library from a REPL to verify if it is functional or not.