Uhd_find_devices not detecting USRP2

GNU Radio
1

Hi Everyone,

I recently found a couple USRP2’s that have not been used for some time
in
my lab, and decided to use them for some testing. One of the USRP2’s
worked
perfectly when I connected it up to the host computer, but the other one
is
giving me issues. The uhd_find_devices is not able to detect this
device.
I tried debugging this issue by first swapping the SD card from the
working
USRP2 to the faulty one, with no success. I also tried reconfiguring
the IP
address with the command:

sudo ./usrp2_recovery.py --ifc=eth0 --new-ip=192.168.10.4

Both uhd_find_devices and uhd_usrp_probe --args “addr=192.168.10.4”
still
did not work. The LEDs on both USRP2’s light up the same exact way. I
have
now run out of ideas of what to do. Does anybody else possibly have a
solution to this problem?

Thank you very much in advance,

Rob

–
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2

On 12/09/2013 10:07 AM, rmsrms1987 wrote:

sudo ./usrp2_recovery.py --ifc=eth0 --new-ip=192.168.10.4

It may be that the one that’s not responding is still running “classic”
firmware, which was not TCP/IP based.

http://files.ettus.com/uhd_docs/manual/html/usrp2.html#load-the-images-onto-the-sd-card-usrp2-only

–
Marcus L.
Principal Investigator
Shirleys Bay Radio Astronomy Consortium

3

On 12/09/2013 11:45 AM, rmsrms1987 wrote:

Hi Marcus,

Thank you for the response. Does swapping the SD card from the working
USRP2 to the faulty one not override this issue? I tried that, but it still
is not being detected. Maybe this is a hardware related problem.

  • Rob

Yes, that should work.

Do the Ethernet interface LEDs light up when you plug the USRP2 into a
1GiGe port on your computer? [They’ll be dim]

–
Marcus L.
Principal Investigator
Shirleys Bay Radio Astronomy Consortium

4

Hi Marcus,

Thank you for the response. Does swapping the SD card from the working
USRP2 to the faulty one not override this issue? I tried that, but it
still
is not being detected. Maybe this is a hardware related problem.

  • Rob

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5

Hi Marcus,

They do light up, mostly just the left LED. Just to confirm, I tried
the
working USRP2 and it lights up the same exact way. Also the LEDs on the
Ethernet card on the host computer light up.

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6

When I try to ping, it is not able to see the USRP2. The output states
“Destination Host Unreachable”. I tried both 192.168.10.2 and
192.168.10.4
since I ran “sudo ./usrp2_recovery.py --ifc=eth0 --new-ip=192.168.10.4”
previously.

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