It’s clearly not an N210 if you’re getting LIBUsB errors. Perhaps it’s a B210?
This sounds like insufficient power being supplied by your USB controller. Try an external power supply if it’s a B210. Sent from my iPhone > On Dec 21, 2020, at 6:50 AM, Philipp Schach via USRP-users > <[email protected]> wrote: > > > Hi guys! > I am new here and needed some help. My name is Philipp and I am a student at > HTW Berlin in Germany. > We have built a small test network with srsLTE in our lab. The network > consists of a computer with a USRP N210 and a Virtual Access GW2028 as UE > with a Pi. The computer runs the eNodeB service of srsLTE with Open5GS as > EPC. The network was built by another student last semester. It was > configured for band 3 at 1800 MHz. Now the network should run in band 31 at > 450 MHz. Basically it runs as well. The GW2028 successfully logs in. However, > after a short time there is an error with the USRB N210: > > [ERROR] [UHD] An unexpected exception was caught in a task loop.The task loop > will now exit, things may not work.EnvironmentError: IOError: usb rx8 > transfer status: LIBUSB_TRANSFER_NO_DEVICE > /home/u1804/srsLTE_20_10/srsLTE/lib/src/phy/rf/rf_uhd_imp.cc.228: USRP > reported the following error: EnvironmentError: IOError: usb rx6 transfer > status: LIBUSB_TRANSFER_NO_DEVICE > > After the appearance the command "uhd_find_devices" returns wrong answers. > The serial number is no longer returned completely or no device is found at > all. After a restart it runs again for a few minutes and then crashes again > with the error. > In band 3, everything was supposedly running relatively stable. > > Unfortunately, due to Corona, I am not at the university in the lab every > day, but I plan to be there in the next few days. > If more information is needed, I will submit it when I am on site. Currently > running a version of Ubuntu 18 as operating system. UHD is installed in > version 3.15. > > Has anyone had this problem before, or could kindly help me? > > Greetings Philipp > _______________________________________________ > USRP-users mailing list > [email protected] > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
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