[aprssig] WIDE and specific call in path

jason arends jason.arends at gmail.com
Sat May 14 20:00:37 CDT 2016

On Sat, May 14, 2016 at 7:39 PM Stephen H. Smith <wa8lmf2 at aol.com> wrote:

> On 5/14/2016 4:49 PM, jason arends via aprssig wrote:
> > Today I was trying to route my packets through a specific digi by
> setting my
> > path on my mobile to WIDE1-1,JOPLIN - thinking that it would either be
> picked
> > up by a fill-in and then JOPLIN, or JOPLIN would hear it first and
> repeat it
> > due to responding to the WIDE1-1.
> This doesn't work!   Hops are processed SEQUENTIALLY from left to right.
>  Some
> digi has to act on the WIDE1-1 hop FIRST, marking it as used on the
> retransmission.  Then, if the Joplin digi hears the retransmission from the
> first digi, it would respond to JOPLIN, marking IT as used.
> If you manage hit JOPLIN directly on the first hop, it is "using up" the
> WIDE1-1 hop. The JOPLIN hop is then "wasted" since no other digi will
> respond
> to that call.
Right, that's why I think it *should* work - if I hit JOPLIN directly, it
should repeat because it *does* respond to WIDE1-1, that's why
WIDE1-1,WIDE2-1 works. Then no other station will respond to the "wasted"
JOPLIN in the path, so it should always either get repeated by a fill-in,
then JOPLIN, or just JOPLIN if I manage to hit it directly.

I suspect my real issue is I'm just not able to hit JOPLIN when I think I
should be able to, or the quality of the packets from the setup I'm using
to test is sub-par but the fill-in K0JAA is more forgiving maybe. I'll do
more testing with another radio.

JOPLIN is a Microsat WX3-in-1 2.0 on a FT-2800 and K0JAA is a TNC-PI on a
DR-135, I was testing using a BaoFeng with a Mobilinkd and APRSDroid,
through a magmount as I was driving around.

> I only heard a repeat from the fill-in, not
> > when I was close to JOPLIN and out of range of the fill-in. Do paths not
> work
> > the way I  am thinking, or do I have JOPLIN misconfigured in some way?
> In the path setup above (WIDE1-1,JOPLIN), JOPLIN is only going to respond
> to
> it's own call if (and only if) some other digi within earshot of JOPLIN
> "uses
> up" the WIDE1-1 hop first.
> Or is
> > JOPLIN ignoring it because it's own call is already in the path?
> >
> > WIDE1-1,WIDE2-1 does work, I was just trying this to keep packets local
> as a test.
> >
> > ~jason
> >
> >
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> > aprssig at tapr.org
> > http://www.tapr.org/mailman/listinfo/aprssig
> >
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