[aprssig] WB4APR SK

Steve Dimse steve at dimse.com
Wed Feb 9 12:43:54 EST 2022

> On Feb 9, 2022, at 12:17 PM, Peter Laws N5UWY <n5uwy at arrl.net> wrote:
> Is there a proper, preferably extensible, APRS protocol document?  Bob
> was visionary, but it always seemed like he was adding things to the
> system without a plan.

There is a spec, created in 2000. It is not perfect, but we got most of it right.


Bob maintained pages with errata and changes on aprs.org.

The spec has a user-defined format, which allows a programmer to do almost anything after the first three characters, it has been rarely used.

Steve K4HG

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