[Tinyos-help] Delta application -help required
siva prasad
sivakatru at gmail.com
Thu Aug 31 22:13:14 PDT 2006
thanks for tht idea michael...
if i changed the value of AM_COUNTMSG to some other value(say 35) it is was
compiling ..but it is not sending any data....why..?
now i want to introduce one more "uint_16t reading2" variable into the
structure..deltamsg:--
----for using another external ADC port and sending tht value...in the msg..
it was compiling but ...it is not sending any data...i think this is the
problem with the AM_DELTAMSG=33....i hav tried with different values of the
same value ....still it is not working...
pls help me...
On 8/31/06, Michael Schippling <schip at santafe.edu> wrote:
>
> Usually anything starting with AM_ is meant to be used
> as a message type indicator, to stick in TOS_Msg.type
> The values are arbitrary, and there is no master
> dictionary of types.
>
> Also, one thought on your sampling problem. If the signal
> changes you are interested in are sporadic, you might have
> the mote detect them and only transmit when there is some
> thing of interest.
>
> MS
>
> siva prasad wrote:
> > 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
> > <mailto: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>
> > > <mailto: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>>
> > > > <mailto: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>> >
> > > <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
> > <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>>>
> > > > > <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
> > <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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