UART Bridge Mode Issue: Fails to Open Serial Port in WebSerial

[seuros]

I am encountering an issue with the Hydrabus device when trying to use UART bridge mode. Specifically, I am unable to connect to the device using WebSerial via a browser. The connection attempt fails with the error "Failed to open Serial port."

Steps to Reproduce

• Connect the Hydrabus device to the computer.
• Switch the Hydrabus to UART bridge mode using the appropriate commands.
  • uart 1
  • speed 115200
  • bridge
• Open a browser and navigate to a WebSerial application. example https://web.esphome.io
• Attempt to connect to the Hydrabus device.

Expected Behavior I expect the browser to successfully connect to the Hydrabus device in UART bridge mode without any errors.

Actual Behavior The browser fails to connect to the Hydrabus device, and I receive an error message stating "Failed to open Serial port."

Board: Hydrabus v1.0

[0x8008135]

Hello,

Looks like you have a permission issue. I tested and could get it listed and even interact with the shell or uart bridge.

[bvernoux]

Thanks for your feedback @0x8008135 so the issue is solved waiting feedback from seuros Yes I confirm I have tested on my side with Windows11 Pro it works perfectly using Chrome browser v124 (or any browser which support correctly WebSerial) When configuring bridge you shall exit and release the USB COM port before to switch to Chrome browser and use WebSerial like https://web.esphome.io

[seuros]

I confirm, Windows worked flawlessly.

For Linux i had to add the user to the dialout group, then reset the session.

$ sudo usermod -aG dialout $USER

Thanks

[bvernoux]

Thanks for the confirmation for information the step to provide the USB CDC permission for Debian/Ubuntu is explained in Wiki:

• https://github.com/hydrabus/hydrafw/wiki/Getting-Started-with-HydraBus-flash-and-use-hydrafw-on-linux#using-hydrabus-hydrafw-with-debianubuntu
• See files in https://github.com/hydrabus/hydrafw/tree/master/utils/udev-rules