Hi Henric, Do you have a node 0 or a node connected to the PC running Trawler? These nodes serve as the reference for the synchronization, so one must exist in your network. Programming a node with address=0 is usually the easiest way to achieve this.
-Joe On 8/18/06, Henric Kärnhall <[EMAIL PROTECTED]> wrote:
Hi Joe! Thank you for your quick answer about Netsync. If I use "make tmote lowpower,#" I get a stable sync and a maximum duty cycle of 50% (as you told me). And when I use "make tmote" I get a dutycycle of 100% (as you told me), BUT a never get a stable sync! I fact I don't get sync at all. When I say stable sync I mean that GlobalTime.isValid() should be true during a long time period. I need this because I plan to use the globaltime to get a synchronized timestamp of samples with a high accuracy. QUESTION: The problem is: How do I get 100% dutycycle AND synchronization at the same time? What parameters should I modify? Or is it not possible? I would be happy if you could answer this because I have been working on this problem for a very long time now. /Henric ----- Original Message ----- From: Joe Polastre <[EMAIL PROTECTED]> Date: Thursday, August 17, 2006 6:22 pm Subject: Re: [Tinyos-help] Problem with Netsync, restarting motes. To: Henric Kärnhall <[EMAIL PROTECTED]> Cc: tinyos-help@millennium.berkeley.edu > Hi Henric, > > When you want to use lowpower, you should compile with: > > make tmote lowpower > > If you want a 100% duty cycle, then compile with: > > make tmote > > To change the duty cycle that the application is compiled with (from > 1-50% are supported), you can compile with the following option: > > make tmote lowpower,# > > where # is a number between 1 and 50 representing the duty cycle. > > Furthermore, you may want to check out > > http://www.moteiv.com/community/Moteiv_Boomerang_Fixes > > for the most up-to-date supported patches. There is a patch there > for NetSync with Boomerang 2.0.4, FYI. > > -Joe > > > On 8/17/06, Henric Kärnhall <[EMAIL PROTECTED]> wrote: > > Hi, > > > > I'm using tinyos 2.0.4 from Moteiv and the netsync component to get > > synchronized time information when i'm sampling data. I have > changed the > > dutycycle to 100% > > LOWPOWER ?= 100 in the file lowpower.extra > > to get a higher data rate on the radio. (Is this a correct way > to get > > higher data rate with sync?) > > > > My problem is that it takes 3-5 (or more) minutes before the > slave nodes > > have a stable sync to the master node. The startup time is not a big > > problem but during that time the slave nodes are restarting (?). It > > seems like they get a reset? The StdControl.init() function is > executed.> And it also happens that the slave nodes drops the sync, > 10-30 minutes > > after it has stabilized, and the procedure must start all over > again.> > > Is this normal? > > > > /Henric > > > > _______________________________________________ > > Tinyos-help mailing list > > Tinyos-help@Millennium.Berkeley.EDU > > https://mail.millennium.berkeley.edu/cgi- > bin/mailman/listinfo/tinyos-help > > >
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