[aprssig] X-APRS: a new protocol in APRSdroid

Matthew Chambers mchambers at showmeham.info
Sat Apr 1 09:52:51 CDT 2017


Steve,

I've had very few of the problems described. While it shows up in APRS.fi
my client at home ignores the skewed or out of order position reports. I've
actually had worse data skew problems on 2m in North Missouri where my
packets have to be digi'd 200mi to get to an igate.

Matthew Chambers, CBT, NR0Q



On Apr 1, 2017 9:43 AM, "Steve Dimse" <steve at dimse.com> wrote:


> On Apr 1, 2017, at 3:32 AM, Georg Lukas <georg at op-co.de> wrote:
>
> in the past I've often realized that APRS-IS does not work well with
> mobile TCP/IP - latency on 2G or 3G causes delays that skew the position
> reports; interruptions in the data connection are almost impossible to
> detect at application level, and thus cause packet drops, etc.

I have no practical experience with Android, but in iOS I've not seen any
of these problems. And if Android's best answer to 2G/3G latency is to turn
a ~70 byte APRS packet into a few hundred characters of XML, I'm going to
burn an extra stick of incense at my shrine to Steve Jobs (all us Apple Fan
Boys keep one in our homes) today in thanks!

Steve K4HG
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