We successfully had about 150 telosb nodes connected to one Linux laptop. The theoretic USB limit is 127 devices, including hubs, per bus. Usually your computer has multiple buses. We actually tried to have 200 connected, but Linux didn't want to enumerate all of them and stopped at about 150. We had a tree topology of one 10 port hub connected to 5 other 10 port hubs. We had 4 of these configurations, each on an individual USB port on the laptop.
In your case, I suspect a bad cable could be the problem? Or if you rub On Jan 15, 2013 7:52 AM, "Constantinos Marios Angelopoulos" < [email protected]> wrote: > Hi guys, > > in one of our work here ( > http://www.hobnet-project.eu/files/papers/Experimental_Evaluation_of_Energy_Balance.pdf) > we have connected 27 TelosB motes via a USB tree topology. > > The PC was running on Ubuntu 10.04. > > Regards, > Marios > -- > Constantinos Marios Angelopoulos > > Department of Computer Engineering & Informatics > University of Patras and CTI & Press "Diophantus" > > > > On Tue, Jan 15, 2013 at 10:33 AM, Antonio Liñán C. <[email protected]>wrote: > >> I think you hit a magic number, I haven't done this test myself, are you >> connecting all motes to the same hub or how are you grouping the motes? >> >> I'll try this on the afternoon for the kicks :) >> >> --Antonio >> >> On Mon, 2013-01-14 at 23:12 +0100, wasif masood wrote: >> > >> > >> > Dear All, >> > >> > >> > Does any of you have ever experienced about how many sensor nodes we >> > can attach to a PC. In my experience, using external powered USB hubs, >> > one can get as many connections as could but when it comes to serial >> > logging, not all the nodes can get their data to the BaseStation via >> > serial connection. Yesterday, I tired upto 10 and they worked just >> > fine, but if I try to increase them beyond 10 some nodes just >> > meteriously can't log any thing. >> > >> > Please share your experieces! >> > Regards! >> > Wasif Masood >> > >> > _______________________________________________ >> > Tinyos-help mailing list >> > [email protected] >> > >> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >> >> >> _______________________________________________ >> Tinyos-help mailing list >> [email protected] >> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >> > > > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >
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