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Unknown USB Device
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Unknown USB Device

by michaelmacartney on Tue Feb 26, 2019 5:31 pm

Hello,

I recently purchased some boards the ItsyBitsy 16Mhz 5v x 2 and the Feather Bluefruit, however one of ItsyBitsy boards doesn't seem be connect correctly.

When connected I get a popup from Windows saying it isn't recognized. In device manager it says "Unknown USB Device (Device Descriptor Request Failed)". Internal message: "Windows has stopped this device because it has reported problems. (Code 43)
A request for the USB device descriptor failed."

The same cable works on the other two boards, which surely rules out the cable.

Any ideas would be appreciated?

Regards

Michael

michaelmacartney
 
Posts: 9
Joined: Fri Nov 06, 2015 3:10 pm

Re: Unknown USB Device

by michaelmacartney on Tue Feb 26, 2019 5:41 pm

It has somehow fixed itself, I compiled the project and then clicked reset twice, the COM port appeared and it succeeded.

Now the only difference really is I loaded a different project onto it (strandtest). When I loaded my FastLED project again it broke again and the COM wasn't found.

Any idea what causes this to happen?

Moved some code around in my FastLED project and it started working, perhaps my code broke it.

michaelmacartney
 
Posts: 9
Joined: Fri Nov 06, 2015 3:10 pm

Re: Unknown USB Device

by adafruit_support_carter on Tue Feb 26, 2019 8:01 pm

It sounds like maybe this:
https://learn.adafruit.com/adafruit-fea ... help#faq-4

If you works reliably with a simple sketch like blink, then it might be something with the specific sketch you are uploading.

adafruit_support_carter
 
Posts: 12726
Joined: Tue Nov 29, 2016 2:45 pm

Please be positive and constructive with your questions and comments.