Plugin not working after upgrade of OctoPi / Python Version

[PvdDriesch]

Hello everyone,

I have been succesfully using this plugin during the past year with an old OctoPi / Python Version.
However, as OctoPrint warned me, that the Python Version in use was at the end of it's life and will no longer be supported by OctoPrint Versions beyond 1.11, I decided to setup a new SD card with a fresh OctoPi installation.
Before swapping the SD cards I created a backup of OctoPrint settings and plugins, which I uploaded to the new OctoPi installation.

After that, I found out that most plugins seem to work.
However, the Filament Scale Enhanced plugin shows either "Loading..." or a "0g" reading regardless of what I try:
e.g. calibration, reinstalling the plugin
To exclude a hardware / connection problem, I switched again to the old SD card and it worked as expected.

My question would be:
Is there any known issue regarding compatibility of the Filament Scale Enhanced plugin with the following software configuration, which is running on a Raspberry Pi 4 Model B?

OctoPrint 1.11.1
Python 3.11.2
OctoPi* 1.1.0 (build 2025.05.13.134411)

Thanks in advance.

Kind regards
Patrick

[StoneAgeSkillz]

Same for me. Not even after clean install, without restoring backups. Could be issue with enviroment, OLED plugin stopped working too.

[PvdDriesch]

Hi StoneAgeSkillz,

I almost forgot that I posted my problem here.
In the meantime I solved it by myself:

From the Octoprint Logfiles I could see, that a specific function in the filament scale plugin caused this issue.
I found out, that this function (if I remember correctly, some kind of "wait until ready" function) was no longer supported.
After that, I made some changes to the python script of the plugin to get rid of this function and installed the modified plugin manually.
Now it is working again.

Unfortunately, I do not have access to my changed script at the moment. Otherwise I could have posted the full solution here.

Kind regards,
Patrick

[techman83]

Oh nice! I haven't got an OctoPi based printer anymore, so it's hard for me to verify. I'd happily take a PR and release an updated fix.

[PvdDriesch]

Hello techman83,

I checked the original source code again and if I remember correctly line 77 in the hx711.py script caused the issue.
The function "GPIO.wait_for_edge" seems to be no longer supported by newer versions of python and will result in a runtime error.
I think that I used a workaround, which I found on the internet to fix this.

Kind regards,
Patrick

[StoneAgeSkillz]

This is excellent news. Now i have only the OLED plugin to fix. But this is a great lead, probably the same issue. Thank you both.

[PB45-99]

Will there be an official update for the new py version or does this plugin will no longer supported?

[techman83]

I haven't got an OctoPrint install running anymore. There is a CI/CD process, so if I get PRs I'm more than happy to merge/release. Work has kept me from keeping on top of my side projects for a while unfortunately.