Sorry I forgot to replay on the list:
Xastir is connected to one radio via a Mobilnkd TNC2 and receives/xmits
through radio 1, and Icom IC-V8000
Radio 2 is a Yaesu FT-991 with a built-in USB sound card. I'm using
direwolf to ready the APRS packets from this radio
Radio 3 is a Yaesu FT1XD with built in APRS.
When I click the Interface menu in Xastir, then click "trasmit now," the
packet I provided earlier is what gets received by both radio 2 and 3.
It's also what shows up in Xastir in the logs and in the "Display packet
Data" window.
There is no doubt in my mind that xastir is creating this bad packet.
The question is, why?
Tom Henderson
On 10/23/18 4:05 PM, Jason KG4WSV wrote:
Maybe I've missed something, but I don't know how your packet is getting
from xastir to the receiver that's connected to direwolf. This is the
packet that direwolf (allegedly :) received, which may or may not be the
packet that xastir actually sent.
when I look at raw data from aprs.fi there are other mangled third party
versions of your packets, similar to the one you posted but with different
call signs in the digi/gate slots.
-j
On Tue, Oct 23, 2018 at 3:57 PM Tom Henderson <[email protected]> wrote:
OK, that explains what a third party packet is. What I still don't
understated s why xastir is generating a third party packet as its
beacon, and a malformed one at that. Is anyone else experiencing this
from the beacons xastir transmits?
Tom Henderson
On 10/23/18 3:17 PM, Jason KG4WSV wrote:
On Tue, Oct 23, 2018 at 2:44 PM Tom Henderson <[email protected]> wrote:
Can you explain what you mean by "third party packet?"
Short answer, it's packet that's embedded in another packet. Usually
(only?) seen on-air when an Igate takes a packet from the network and
transmits over RF.
from http://www.aprs.org/APRS-docs/PROTOCOL.TXT :
THIRD PARTY FORMAT: One special format character } allows any APRS
packet to be carried or transmitted by any other station. This is
what allows the both the ZIPLAN and IGATE messaging capability! On
receipt of a 3rd party packet, the original header is dropped and the
packet is recursively parsed again, beginning at the {. To show that
it has been carried by another station, the call of that station is
extracted from the as-received header and inserted as a pseudo digi*
in the digi path. Example:
W3XYZ>APRS,DIGI*:}W4ABC>APRS,WIDE:>121234zStatus
will be processed as W4ABC>APRS,WIDE,W3XYZ,DIGI*:>121234zStatus
Notice how the "carrying station" W3XYZ is inserted as if it had been
a digi in the path
also see
http://www.aprs-is.net/IGating.aspx
http://www.aprs-is.net/IGateDetails.aspx
-Jason
kg4wsv
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