Christian:
We have had good luck with the
ATAVRRZUSBSTICK-ND
USB stick from Digikey, and viewing the 802.15.4 packets with
Wireshark. The instructions at
http://www.newae.com/tiki-index.php?page=RavenUSBProgramming
are helpful in programming the device.
Brad Nickerson
cs.unb.ca/~bgn
On 13-09-12 8:32 PM, Eric Decker wrote:
you need a sniffer
trying to do this by getting somekind of tell tale from the code is
very difficult.
you need to instrument the network.
On Thu, Sep 12, 2013 at 2:55 PM, Srikanth Nori <[email protected]
<mailto:[email protected]>> wrote:
Hi Christian,
In my experience at least, tracking down problems with ACKs has been
phenomenally difficult. I have no direct advice but a couple of
suggestions:
On Fri, Aug 30, 2013 at 10:10 AM, Christian Renner
<[email protected] <mailto:[email protected]>> wrote:
>
> We have 3 nodes: one receiver R and two senders A and B.
Software ACKs
> are used.
Have you tried with hardware ACK? Is there a reason you're using
software ACKs?
>
> - I installed a sniffing node to see what really is on the
channel: only
> the ACK from R to A (no ACK from R to B!)
Just out of curiosity - what sniffer are you using? I used a cc2531emk
[1] and I know it missed some packets either because of radio
interference/losses (which makes sense) or potentially due to USB
issues (which doesn't, and can be very misleading).
> The question now is if it is possible that a packet from the
RXFIFO is
> obtained a second time and how this issue could be solved.
Perhaps someone more knowledgeable than me should comment on this, but
my understanding is that this is very unlikely because of the nature
of the design. I believe the FIFO is emptied as it is read.
[1] http://www.ti.com/tool/cc2531emk
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Eric B. Decker
Senior (over 50 :-) Researcher
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