[Tinyos-help] Delta application -help required
siva prasad
sivakatru at gmail.com
Thu Aug 31 07:49:57 PDT 2006
hi...sorry to bother u again...
why in Delta application ..the "enum"....AM_DELTAMSG is initialised to 33;
can any body pls explain....
On 8/30/06, Michael Schippling <schip at santafe.edu> wrote:
>
> Keptin, I kenna change th'laws o'physics...
>
> siva prasad wrote:
> > again thanks for tht explanation...i can understand tht problem...
> > As i told previously, my system is highly dynamic in nature...in order
> > to monitor such dynamical system is there any better idea...not like
> > sending 10 readings in one packet after 10ms...
> >
> > thanks in advance...
> >
> > siva katru
> >
> > On 8/30/06, *Michael Schippling* <schip at santafe.edu
> > <mailto:schip at santafe.edu>> wrote:
> >
> > As I said, based on my (small) experience with micaz I believe
> > that 100 messages per second is about the max you can expect.
> > And that 100 is for the total system, not per mote (unless of
> > course you have only one mote transmitting). If you are doing
> > multihop then you need to divide the total messages by the
> > number of hops (each hop being it's own message) to get even
> > a best case estimate -- ignoring hidden nodes and any other
> > actual practical considerations.
> >
> > So the only way I see to get your higher sample rate is to
> > aggregate samples, say 10 per message. You would need to
> > do some testing in various configurations to see how many
> > messages you can get...let's say, the source and two hops gives
> > you best case 30 msg/sec, with 10 samples/msg, is 300 samples/sec.
> >
> > Nobody said that motes were a High Speed sensor network...
> > MS
> >
> >
> > siva prasad wrote:
> > > thanks for ur reply michael,
> > >
> > > if i sample the signal at 1ms(suppose for 50hz signal) then it
> > will be
> > > better ...that is required for my application ...one more thing
> > is that,
> > > the system tht i want to monitor is highly dynamic in nature..so
> the
> > > data should be send for every 1ms...i think 1ms is sufficient for
> > just
> > > measuring the external ADC value..and sending this value using
> > > multihop(must) technique...
> > > But the problem is..... i am losing lot of packets abt 50% even
> > for the
> > > sampling period at 10 ms....do u hav any different idea tht
> > ...how can i
> > > overcome this problem....
> > > any help should be highly appreciated...
> > >
> > > if we cant sample and send(using multihop) the data in 1ms ...pls
> > give
> > > the reason...
> > >
> > > still i did nt clear my old doubts...
> > >
> > >
> > > On 8/30/06, *Michael Schippling* <schip at santafe.edu
> > <mailto:schip at santafe.edu>
> > > <mailto:schip at santafe.edu <mailto:schip at santafe.edu>>> wrote:
> > >
> > > I don't know the message rate you can expect from moteiv
> motes
> > > but if you are trying to send one sample every 10ms you are
> > > probably pretty close to the limit (somewhere on the order of
> > > 100 msg/sec is the max for micaz's). You'll probably need to
> > > collect multiple samples in one message to get anywhere at
> > 30Hz...
> > >
> > > Let me know if you need clarification one answers to your
> other
> > > questions.
> > > MS
> > >
> > >
> > > siva prasad wrote:
> > > >
> > > >
> > > > From: *siva prasad* <sivakatru at gmail.com
> > <mailto:sivakatru at gmail.com>
> > > <mailto:sivakatru at gmail.com <mailto:sivakatru at gmail.com> >
> > <mailto:sivakatru at gmail.com <mailto:sivakatru at gmail.com>
> > > <mailto:sivakatru at gmail.com <mailto:sivakatru at gmail.com>>>>
> > > > Date: Aug 28, 2006 12:52 AM
> > > > Subject: Delta application -help required
> > > > To: tinyos-help at millennium.berkeley.edu
> > <mailto:tinyos-help at millennium.berkeley.edu>
> > > <mailto: tinyos-help at millennium.berkeley.edu
> > <mailto:tinyos-help at millennium.berkeley.edu>>
> > > > <mailto: tinyos-help at millennium.berkeley.edu
> > <mailto:tinyos-help at millennium.berkeley.edu>
> > > <mailto: tinyos-help at millennium.berkeley.edu
> > <mailto:tinyos-help at millennium.berkeley.edu>>>
> > > >
> > > > hi all...
> > > >
> > > > i am working on sampling the ADC value instead of
> > > DEmosensorc...in the
> > > > delta application provided by moteiv.....
> > > >
> > > > i am glad to say tht ..i hav successfully compiled it ...
> > > > and installed..it worked...
> > > > the problem is when i tried to undrstand the program..i am
> > facing
> > > some
> > > > difficulties....
> > > >
> > > > -> i could nt understand the task..named...sendDone( )
> > > >
> > > > -> while i tried to see the raw data using listen
> > tool...it is
> > > showing
> > > > 42 bytes...but i could nt figured out the data format..
> > > >
> > > > ->one more problem is...the signal tht i want to sample is
> > a low
> > > > frequency signal..abt 30Hz...
> > > > if i increase the sampling time to 10ms ..i am losing
> > lots of
> > > packets...
> > > >
> > > > can any body pls help me...
> > > >
> > > > thanks
> > > >
> > > > siva katru
> > > >
> > > >
> > > >
> > >
> >
> ------------------------------------------------------------------------
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> >
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