hi there
UDPEcho is not behaving well, for eg, while pinging the UDPEcho installed
motes, the basestation gets too many DUP! packets in reply,
on an average, the count of DUP! packets is more than actual ping reply
packets.
Reason for this?
Regards,
Nithin
I believe this is an issue with the iris radio stack when using
software acks? I remember that its ack timeout was set to be shorter
than the software turnaround time on an epic platform. However, I'm
not an iris expert...
Steve
On Mon, Sep 6, 2010 at 10:16 PM, nithin k n wrote:
>
> hi there
>
Hi Stephen,
I think the stack never duplicates data packets. Do you mean that if
an ack packet does not arrive on time, then BLIP will retry, which on
a MAC level is a new message, but on the BLIP level it is a duplcate
UDPEcho packet?
Zsolt and Krisztian, can you increase the SOFTWAREACK_TIMEOUT
Hi!
Read the following files:
tos/chips/rf2xx/README
tos/chips/rf2xx/rf230/README
This can be set in your Makefile by adding the line
CFLAGS += -DSOFTWAREACK_TIMEOOUT=2000
By the way, it seem that the problem lies with the serial
communication between the PC and the IRIS. We try to find the ex
Hi all
Found a solution for solving this issue.
You should either define the RF230_HARDWARE_ACK flag in both the Makefiles
of UDPEcho and IPBaseStation
or the SOFTWAREACK_TIMEOUT flag and set it to minimum value of 900.
CFLAGS += -DSOFTWAREACK_TIMEOUT=900
Although the predefined value for SOFTWA
Hi Stephen,
We saw some very strange things, that the software ack was transmitted
quite late after the data message. (Actually we saw 3500 microseconds
between the SDF of the data and ack packets, but the data packet was
quite full, probably very close to the 100 byte limit, so transmitting
the d
Hi Guys!
Ok, I found the bug (after a discussion with Zsolt).
In tos/platforms/iris/chips/rf230/RadioConfig.h we set
SOFWAREACK_TIMEOUT to 800 (microseconds) if it is undefined. This
value should be increased to at least 900 microseconds. In fact, I
have increased it to 1000 just to be safe. The
t;> >
>> > regards,
>> > Nithin
>> > ------ Forwarded message --
>> > From: nithin k n
>> > Date: Thu, Oct 7, 2010 at 6:47 PM
>> > Subject: Fwd: [Tinyos-help] Fwd: UDPEcho in iris
>> > To: Miklos Maroti
>> >
son ?
> >
> > regards,
> > Nithin
> > -- Forwarded message --
> > From: nithin k n
> > Date: Thu, Oct 7, 2010 at 6:47 PM
> > Subject: Fwd: [Tinyos-help] Fwd: UDPEcho in iris
> > To: Miklos Maroti
> >
> >
> > the pinging to iris st
look at this. Miklos
>> >>
>> >> On Thu, Oct 7, 2010 at 3:18 PM, nithin k n
>> >> wrote:
>> >> > hi Miklos,
>> >> > the pinging to iris gets stuck every time after 165 pings (on an
>> >> > average) .
>> >
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