Hi Ruben,I just noticed I left out words from the first sentence, I hope I
haven't confused things.I should have typed1) Timing is probably not accurate
enough
Good luck with finding a solution.
Mark.
> Thank you so much for your answer Mark,
> I will have a look at those hardware-dependent interfaces and I will
> keep you informed if I do any progress.
>
> Best Regards
>
> Mark Proctor escribió:
> >
> > 1) Timing probably accurate enough, you would have to measure
> > nanoseconds even with out processing at the ends.
> > I guess you could try measuring signal strength but that will depend
> > almost as much on the environment as on distance.
> >
> > 2) I think there are are different interfaces for different hardware
> > try googling CC2420Packet and CC2420PacketC
> >
> > > Date: Thu, 26 Nov 2009 12:44:20 +0100
> > > From: ru...@lcc.uma.es
> > > To: tinyos-help@millennium.berkeley.edu
> > > Subject: [Tinyos-help] Distance estimation
> > >
> > > Dear all,
> > >
> > > I wanted to ask a couple questions that are aimed at the same end. The
> > > objective is to be able to localize mobile sensors when the come in the
> > > hearing range of another sensor, for instance, the base station. This
> > > is somehow intended for indoor location tracking. Then my questions are
> > > the following
> > >
> > >
> > > 1) Is it possible to use TinyOS in order to estimate (with a low error,
> > > ie. ~1 meter) the distance between two communicating nodes? My idea is
> > > using round trip times but I don't know how accurate this could be due
> > > to the processing time of the nodes.
> > >
> > >
> > > 2) Is it possible to reduce the transmission power of sensor nodes so
> > > that only a node close can receive the signal? I thought this could
> > > possibly be done with the LowPowerListening interface, but having a
> > > quick look at the interface I only saw methods related to the duty cycle.
> > >
> > > Any comments, suggestions or experiences are welcome
> > >
> > > --
> > > Ruben Rios
> > > _______________________________________________
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> > > Tinyos-help@millennium.berkeley.edu
> > > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
> >
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> --
> Ruben Rios
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