Hello, Are you using the TestFtsp folder and the FtspDataLogger? In my experience, that only happens if node 2, 3, and 4 cannot hear node 1 (maybe too far away, or blocked, or no FTSP code running) so there is two global times: one for nodes 2,3 and 4 and another for node 1.
Quoting Deeksha Rao Sahib <[email protected]>: > Hey, > > Though i don not know about the solution to your problem, i think you > could help me out with FTSP. > > I am trying to run FTSP on telosb motes and i use tinyos-2.1.1. From my > observation, if 3 nodes are running TestFtsp code say node 1(reference) > node 2, 3 , 4 etc. > > nodes 2, 3 and 4 are in sync and their global times match with each other > but the values are nowhere close to that of the node 1 which is supposed > to be the reference. How can i now relate the times of nodes 2 and 3 with > node 1?? > > And this seems to be the problem with whoever the reference is(node with > smallest id). Like if i remove node 1 and let nodes 2, 3 and 4 carry on, > then node 2 becomes the reference whose value is again different from that > of 3 and 4. > > Any idea?? > > > > > Hello all, it's first time here. > > > > I am playing with the TestFtsp application on TinyOS 2.1.1 using MicaZ and > > the > > 32KHz timer precision, having an average error of around 100 microseconds > > in my > > experiments (3-4 clock ticks). > > > > I have learned that FTSP can have precision in the microsecond range, so I > > searched the mailing list archives about having that precision in MicaZ > > platform. They seems contradictory. Here are some of the results: > > > > not possible (in TMote) > > > https://www.millennium.berkeley.edu/pipermail/tinyos-help/2010-January/044090.html > > > > only 32KHz precision is possible (no HIL component providing T32khz) > > > http://mail.millennium.berkeley.edu/pipermail/tinyos-help/2009-February/038482.html > > > > possible with 1.21 microsecond average error after bug fix: > > > http://mail.millennium.berkeley.edu/pipermail/tinyos-devel/2008-August/003364.html > > > > ported microsecond FTSP in MicaZ (possible) > > > http://mail.millennium.berkeley.edu/pipermail/tinyos-help/2008-March/031906.html > > > > Can I confirm if it is really possible or not to have microsecond > > precision of > > FTSP in MicaZ? If it's possible, can you help me with the steps on how to > > change the TestFtsp application in order to support it? It looks like the > > supported is only the TMilli and T32KHz precision. > > > > Any help would be appreciated. Thank You! > > > > - RB > > > > > > > > _______________________________________________ > > Tinyos-help mailing list > > [email protected] > > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > > > > -- > > This message has been scanned for viruses and > > dangerous content by MailScanner, and is > > believed to be clean. > > > > > --Deeksha > > -- > This message has been scanned for viruses and > dangerous content by MailScanner, and is > believed to be clean. > > _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
