PROBLEM IN THONNY'S BACK-END: Exception while handling 'Run' (ConnectionError: EOF).

[seanhspark]

Hi Sterling,

I got a trouble running main.py which is instructed in "1.1 Run the demo".

This was not a problem 2 weeks ago, but when I run it now, it keeps saying the error below:

waiting for connection...
waiting for connection...
waiting for connection...
connected
ip = xx.xx.xxx.xx
PROBLEM IN THONNY'S BACK-END: Exception while handling 'Run' (ConnectionError: EOF).
You may need to press "Stop/Restart" or hard-reset your MicroPython device and try again.

See Thonny's backend.log for more info.

Process ended with exit code 1.
────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────

Unable to connect to COM5: port not found

Process ended with exit code 1.

I tried it with different WiFi connections, but the result was same.
Could you please try running it from your end? Sorry for multiple questions. Thank you.

[sgbaird]

I'll try to check from scratch today. The public test demo seems ok, but there might be something that's changed since then

[seanhspark]

I just happened to resolve this problem without any reason in a different day... It does not raise such error anymore.
One thing I noticed is that the WiFi connection should be set to country="CA" rather than "US", otherwise it raised the connection problem in my case.

Anyways, thank you for your help!!

[sgbaird]

Sorry for the delay here, I'm glad you were able to get it working. This has been a new, recent issue that has been happening for several people I've been chatting with. I've never seen so much trouble with disconnections before. Could be some odd combination between at least two of: the batch of Pico W boards, the firmware (e.g., v1.26.3 and v1.27.0), the version of Thonny, the Windows OS version (or mac, etc.). It seems likely to at least involve Thonny, since we've had much better luck with VS Code recently. This is normally where I'd do my development, but years ago it wasn't as stable, so I kept tutorials to just using Thonny where the directions could stay fixed. The VS Code extension has been much more stable recently (e.g., within last year or two). It's the MicroPico VS Code extension and I also use the official Pico extension which includes the MicroPico extension by default.

If you run into issues, maybe give the VS Code extension a try. Otherwise, it may be prudent to open up an issue on https://github.com/thonny/thonny/issues/new/choose.

[sgbaird]

Related: #217