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 <[EMAIL PROTECTED]> 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* <[EMAIL PROTECTED]
> <mailto:[EMAIL PROTECTED] >> 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* <[EMAIL PROTECTED]
> <mailto:[EMAIL PROTECTED] >
> > <mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>> 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* < [EMAIL PROTECTED]
> <mailto:[EMAIL PROTECTED]>
> > <mailto:[EMAIL PROTECTED] <mailto: [EMAIL PROTECTED]> >
> <mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
> > <mailto: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>>>
> > > Date: Aug 28, 2006 12:52 AM
> > > Subject: Delta application -help required
> > > To: tinyos-help@millennium.berkeley.edu
> <mailto:tinyos-help@millennium.berkeley.edu >
> > <mailto: tinyos-help@millennium.berkeley.edu
> <mailto:tinyos-help@millennium.berkeley.edu >>
> > > <mailto: tinyos-help@millennium.berkeley.edu
> <mailto: tinyos-help@millennium.berkeley.edu>
> > <mailto: tinyos-help@millennium.berkeley.edu
> <mailto: tinyos-help@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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