Hi all,
I am working on a project to extend the firmware of the TTGO
(aprs-over-LoRa) iGate software.
https://github.com/on1arf/LoRa_APRS_iGate
I am currently doing some additional work on the APRS-IS to RF gateway,
specially for APRS "Message" packets.
I am using xastir on my linux laptop to test out my code.
(my igate has ON1ARF-12, my linux laptop/xastir has ON1ARF-14)
A test message I received is this:
ON1ARF-14>APX215,TCPIP*,qAC,NINTH::ON1ARF-12:test 1.2.3.{3y}12
Can somebody help interpret this message?
Looking at the "APRS 101" document (which I guess can be considered to
be the more-or-less official specification for APRS), this seems to be a
normal "Message" APRS-message, with message identifier (which should be
acknowledged by a reverse "ack" message).
But as I had just previously received a "ack12" in a previous message
from the xastir station, it looks like that the "{12" is in fact a
repetition of that.
So, can I interpret this message as a combination of two messages: "test
1.2.3.{3y" and "ack12"
I do not find anything in the "APRS101" document (version 1.0.1 d.d. 29
Aug 2000) that describes this kind of "two-in-one" messages.
So, I am a bit confused why xastir sends this kind of messages packets.
Can somebody shed some light on this?
73
kristoff - ON1ARF
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