Hello Ebtisam, I have no experience with previous UHD versions, but I can tell you that I used the last version with UN210 and USRP1 and it seems to work fine. It is true that I noticed some troubleshooting when executing the uhd_fft.py file, for example with "the peak hold value" or even when just running the file (the GUI got grey and not responsive) . However it seems to be a common problem in many computers (i checked it in two and the problem happened in un210 and usrp1) due to opengl or cpu overcomsuption. I say this just to expose some of the "strange" problems I have encountered so far. To summarize, the master branch of UHD seems to not have problems of compatibility with USRP1.
--M
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