[aprssig] APRS-IS Duplicate Packets
Lynn W. Deffenbaugh (Mr)
ldeffenb at homeside.to
Mon May 3 16:43:03 EDT 2010
As long as it is only for duplicate detection, this shouldn't hurt
(much). If trailing spaces are dropped for subsequent insertion into a
DB or further propagation through APRS-IS or other networks, this is a
big problem.
Lynn (D) - KJ4ERJ
Robert Bruninga wrote:
>> a duplicate I consider the sender callsign-ssid, target
>> callsign and the body of the packet.... Also all white space
>> immediately preceding the cr or lf is dropped from the
>>
> duplicate
>
>> checksum calculation.
>>
>
> Can't do that. Yaesu VX-8R radios end with a space character to
> distinguish the type of radio. The last 2 bytes of a Mic-E
> packet contain the MFR and TYPE codes. For the VX-8R it is a
> space.
>
> Bob, Wb4aPR
>
>
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