EBB U2C V2.1 defect?

[STM3D]

Hi guys,

today I'm creating and flashing my Voron 0.2 with canbus.

When booting the U2C, the blue LED always stays on, no matter if I start without or with boot.

Is the U2C broken? Is it possible to reset it?

[kaktus]

Hello.

Did you find in the manual what this blue led is responsible for

[STM3D]

1 hour ago, kaktus said:

Hello.

Did you find in the manual what this blue led is responsible for

its the light for DFU mode. But it will not in DFU mode.

[kaktus]

My guess is that you connect it via usb.
What is

lsusb

showing you?

[STM3D]

Not it doesn`t and thats a problem

[Александр Беляков]

I also have a similar problem. How to decide?

[kaktus]

Hello.

Paste a link to the manual. I'll read it and see if I come up with something useful. The website https://bigtreetech.github.io/ also contains various user guides.

[Jeff Bradway]

I had the same problem with my U2C constantly showing the blue light and not creating a CAN network. I struggled for days but found this site helpful with the comments about bad firmware:

https://github.com/Esoterical/voron_canbus/tree/main/can_adapter/BigTreeTech U2C v2.1#bad-firmware

See also this video series:

 

[Gustavo Vargas]

Just purchased a U2C V2.1 from Amazon and I'm experiencing the same issues, the unit does not show up on the list after the lsusb command, nor shows up on the list on the dfu-util -l command. Yet the green and blue LED stay on. Are these defective units?