Pyboard does not show as USB device

The official pyboard running MicroPython.
This is the reference design and main target board for MicroPython.
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wusah
Posts: 4
Joined: Thu Jan 03, 2019 12:37 am

Pyboard does not show as USB device

Post by wusah » Fri Jan 04, 2019 9:34 am

After flashing the newest firmware via dfusedemo, I had some issues with Putty not connecting. Now after some time it shows up in the device manager two times. Connecting to COM4 via Putty gives me this error: Image

Connection to COM5 works, though. Unfortunately the Pyboard now does not show as a USB device and I can't access the files. Any ideas?

Image

JeanD
Posts: 3
Joined: Sat Jan 12, 2019 11:09 am

Re: Pyboard does not show as USB device

Post by JeanD » Sat Jan 12, 2019 11:21 am

Similar problem from my side.

- blue, green and red leds are always on.
- Windows 10 do not recognize the PyBoard connected to the USB port
- Win10 Device Manager shows: "unknown USB Device (Device descriptor request failed)"
- Dfuse Demo(v3.0.6) doesnt show any available device.

Any hint from your side will be really appreciated.

ThomasChr
Posts: 26
Joined: Sat Nov 25, 2017 7:50 am

Re: Pyboard does not show as USB device

Post by ThomasChr » Sat Jan 12, 2019 1:00 pm

To rule out a hardware problem boot a Live Ubuntu. It should mount the Pyboard without any drivers on the first try.
After that you know that you‘re facing one of those driver problems windows is famous for and need to install every Pyboard Driver you can get until it finally works!

JeanD
Posts: 3
Joined: Sat Jan 12, 2019 11:09 am

Re: Pyboard does not show as USB device

Post by JeanD » Sun Jan 13, 2019 4:02 pm

Thank you for your reply.

using the command "lsusb" in Ubuntu terminal, the pyboard it does not shows.

Any other suggestion?

Thank you in advance for your comments.

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dhylands
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Location: Peachland, BC, Canada
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Re: Pyboard does not show as USB device

Post by dhylands » Sun Jan 13, 2019 6:45 pm

Also make sure you're not using a "charge only" USB cable

ThomasChr
Posts: 26
Joined: Sat Nov 25, 2017 7:50 am

Re: Pyboard does not show as USB device

Post by ThomasChr » Sun Jan 13, 2019 7:14 pm

Yes, switching the USB Cable is a good idea. Sometimes the cables are crap.

AgentTripleZero
Posts: 2
Joined: Mon Jan 14, 2019 6:54 am

Re: Pyboard does not show as USB device

Post by AgentTripleZero » Mon Jan 14, 2019 7:03 am

I too am having this same problem, have tried all above suggestions and have tried multiple versions for upgrade via DfuSeDemo

JeanD
Posts: 3
Joined: Sat Jan 12, 2019 11:09 am

Re: Pyboard does not show as USB device

Post by JeanD » Mon Jan 14, 2019 11:15 am

I've changed the cable twice and results are the same. Nevertheless, when I start Ubuntu whith Pyboard connected, I found the following message in the Ubuntu start up process:
"usb 5-2 device descriptor read/64 , error -71"

...as expected In Windows 10 also same driver behaviour

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