# No UHD Devices Found (USRP1)

**URL:** <https://www.ruby-forum.com/t/no-uhd-devices-found-usrp1/198973>\
**Category:** GNU Radio\
**Created:** [November 11, 2010, 7:46pm UTC](https://www.ruby-forum.com/t/no-uhd-devices-found-usrp1/198973 "2010-11-11T19:46:08Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![okkezSS](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/o/85f322/32.png) [@okkezSS](https://www.ruby-forum.com/u/okkezSS)\
**Post date:** [November 11, 2010, 7:46pm UTC](https://www.ruby-forum.com/t/no-uhd-devices-found-usrp1/198973/1 "2010-11-11T19:46:08Z")

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I just did a fresh git checkout and install of UHD as described here:  
[http://ettus-apps.sourcerepo.com/redmine/ettus/projects/uhd/wiki](http://ettus-apps.sourcerepo.com/redmine/ettus/projects/uhd/wiki)  
[http://www.ettus.com/uhd\_docs/manual/html/build.html](http://www.ettus.com/uhd_docs/manual/html/build.html)

Everything appears to go smoothly, but ./uhd\_find\_devices reports:  
linux; GNU C++ version 4.4.4 20100630 (Red Hat 4.4.4-10); Boost\_104100;  
UHD\_20101109.230702.c0dfc2c

No UHD Devices Found

my /etc/udev/rules.d/10-usrp.rules contains:  
ACTION==“add”, BUS==“usb”, SYSFS{idVendor}==“fffe”,  
SYSFS{idProduct}==“0002”, GROUP:=“usrp”, MODE:=“0660”

I can still use my USRP1 via GNURadio as before.

Do I need to flash firmware / fpga? If so, where can I find instructions  
on  
doing so?

Thanks  
-Steven

PS: Is it ok to send email to both usrp-users and discuss-gnuradio? I  
know  
you guys are probably trying to increase the SNR, but it seems kind of a  
shame to fragment the community into multiple mailing lists…

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**Author:** ![stevenc](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/4af34b/32.png) [@stevenc](https://www.ruby-forum.com/u/stevenc)\
**Post date:** [November 12, 2010, 1:53am UTC](https://www.ruby-forum.com/t/no-uhd-devices-found-usrp1/198973/2 "2010-11-12T01:53:59Z")

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On Thu, Nov 11, 2010 at 1:43 PM, Steven C. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
wrote:

> Thanks  
> -Steven
> 
> PS: Is it ok to send email to both usrp-users and discuss-gnuradio? I know  
> you guys are probably trying to increase the SNR, but it seems kind of a  
> shame to fragment the community into multiple mailing lists…

If you are talking about using the USRP with GNU Radio, then I’d  
prefer you keep posting to GNU Radio. It will help keep the  
information flowing through here, and the questions/answers might be  
related or pertinent to GNU Radio and not restricted to USRP space.

Tom

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**Author:** ![stevenc](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/4af34b/32.png) [@stevenc](https://www.ruby-forum.com/u/stevenc)\
**Post date:** [June 14, 2013, 6:21am UTC](https://www.ruby-forum.com/t/no-uhd-devices-found-usrp1/198973/3 "2013-06-14T06:21:12Z")

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ACTION==“add”, BUS==“usb”, SYSFS{idVendor}==“0403”,  
SYSFS{idProduct}==“6001”, GROUP:=“usrp”, MODE:=“0660”

megasims@sakumi:/etc/udev/rules.d$ uhd\_find\_devices  
linux; GNU C++ version 4.6.3; Boost\_104601; UHD\_003.004.001-0-unknown

No UHD Devices Found

I need help !!!

removed\_email\_address@domain.invalid