Troubleshooting • Re: Update of NumWorks Calculator using Chromium & WebUSB doesn't work

parisseb on https://github.com/numworks/epsilon/issues/2398 wrote:

Perhaps udev rules are required on your Linux devices, here I have a file /etc/udev/rules.d/50-numworks-calculator.rules

Code:

SUBSYSTEM=="usb", ATTR{idVendor}=="0483", ATTR{idProduct}=="a291", TAG+="uaccess"SUBSYSTEM=="usb", ATTR{idVendor}=="0483", ATTR{idProduct}=="df11", TAG+="uaccess"

Great! It now works to transfer Python scripts. I just had to create this file with this content, and did not need to reboot, and it worked when I plugged in the calculator. I will see if update works when the next update comes.

I did find this now, and I had voted it up years ago, but had forgot about it:
https://www.reddit.com/r/numworks/comme ... alculator/

Statistics: Posted by mob-i-l — Sun Dec 28, 2025 10:52 pm

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