[aprssig] APRS POST HTTP

[John Gorkos]

Please review this treatise on packet lengths inside APRS:
http://lists.tapr.org/pipermail/aprssig_lists.tapr.org/2016-November/046312.html

255 is better than "the best" you can do...

de AB0OO
John Gorkos

On Sat, Mar 7, 2020, 1:36 PM Rafał Antas <antas.rafal at gmail.com> wrote:

> Hi Guys,
>
> Yea UDP package is working fine thanks for that! but it has some stupid
> limitation. ESPEasy GUI I think is not allowing more than 255 characters ..
> if you want to send telemetry or more that that it is not allowing  :(
>
>
> Pozdrawiam,
> Rafał Antas
>
>
> sob., 7 mar 2020 o 21:04 Nick VA3NNW <tapr at noseynick.com> napisał(a):
>
>> John Gorkos wrote:
>>
>> Instead of using HTTP submit, use UDP packets, on port 8080.
>>
>> The format is
>>
>> user CALL pass 00000<linefeed>
>>
>> <properly formatted “on-air” packet><linefeed>
>>
>> You're probably aware, but worth noting: UDP has no confirmation, no
>> ACKs, no retries, no reliability at all. It's certainly VERY lightweight,
>> your one over-the-air packet is creating exactly one over-the-internet
>> packet as well, but you're sending the packet out, and have no idea whether
>> it was received at the far end...
>>
>> ... on the other hand, the same can probably be said of all ham radio,
>> and APRS in particular, so if it already went over-the-air unreliably, the
>> UDP might be the least of your worries   :-)
>>
>> [...] A little bit of solder and some wire, plus about 10 minutes of
>> programming will get you an internet enabled (or APRS-over-TCPIP enabled)
>> environmental sensor for under $7 a piece.
>>
>> Very cool! I may have missed, have you shared all this online, like on a
>> github or anywhere? Would love to hack around with it myself.
>>
>> I've often referred to APRS as "IoT a quarter-century ahead of its time"
>>   :-)
>> Nick VA3NNW
>>
>> --
>> "Nosey" Nick Waterman, VA3NNW/G7RZQ, K2 #5209.
>> use Std::Disclaimer;    sig at noseynick.net
>> Hacking's just another word for nothing left to kludge.
>>
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