Hi Mohamed, UHD 3.5.5, which you seem to be using, is so very old that it lacks crucial features. You should definitely update your UHD version. I assume you're using Ubuntu 14.04 (they are the only ones who still ship this old UHD), so please
sudo apt-get remove uhd-host libuhd003 gnuradio and use pybombs to build UHD in its current version, a GNU Radio that uses that version and everything you need, from source: http://pybombs.info Then, try to ping your USRP: ping <ip-address of your USRP> If that doesn't work, you still have a network problem. Please refer to [1] :) Best regards, Marcus [1] http://files.ettus.com/manual/page_usrp2.html#usrp2_commprob On 17.11.2015 09:13, mohamid92 wrote: > hello > > i tried to implement FM reciever from this video : > https://www.youtube.com/watch?v=KWeY2yqwVA0 > > but the problem is that everytime i need to run the grc an error show which > is: > > ---------------------------------------------- > > linux; GNU C++ version 4.8.2; Boost_105400; UHD_003.005.005-0-unknown > > Using Volk machine: avx_64_mmx_orc > Traceback (most recent call last): > File "/home/mohamed/GNURADIO exercise/top_block.py", line 157, in <module> > tb = top_block() > File "/home/mohamed/GNURADIO exercise/top_block.py", line 92, in __init__ > channels=range(1), > File "/usr/lib/python2.7/dist-packages/gnuradio/uhd/__init__.py", line > 122, in constructor_interceptor > return old_constructor(*args) > File "/usr/lib/python2.7/dist-packages/gnuradio/uhd/uhd_swig.py", line > 1737, in make > return _uhd_swig.usrp_source_make(*args) > RuntimeError: LookupError: KeyError: No devices found for -----> > Empty Device Address > > ----------------------------------------------- > > > > -- > View this message in context: > http://gnuradio.4.n7.nabble.com/connect-USRP-2921-to-gnuradio-tp56967.html > Sent from the GnuRadio mailing list archive at Nabble.com. > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
