[pskmail] Re: Unconnected email
- From: Larry Levesque <ka1vgm@xxxxxxxxx>
- To: pskmail@xxxxxxxxxxxxx
- Date: Thu, 21 Apr 2011 07:06:43 -0400
This could be implemented in fldigi using a simple script and the
"notifier".
The script, after it receives a request via notifier such as
"<cmd:readmail10-ka1vgm>":
- verify the sender "ka1vgm" is registered in the pskmail database
- send out for the last "10" emails from the server.
- wrap and autosend them into small packets (100 characters or so) in
the flmsg plain text format.
- if the mode is not working you could have notifier change modes
with an on-air command like "<cmd:mode-mt63500>" this would then
change the modem in fldigi.
On Thu, Apr 21, 2011 at 09:50:40AM +0200, Pär Crusefalk wrote:
> Hi all,
>
> This is mostly just an idea but perhaps it should be investigated
> further?
>
> Yesterday I talked to Oleg Kazharsky that participated in the polar ring
> arctic expedition. Unfortunately they had some technical difficulties
> with their vehicles so the expedition has been aborted. Unfortunate but
> the main thing is of course that they are safe and can possibly try
> again later (provided there are sponsors etc).
>
> The plan was to use pskmail during the expedition and the main use was
> to be aprs with position reports and short web page updates by using
> unconnected pskaprs emails. When I asked Oleg what else he would want to
> see in there then he wanted something similar to pskaprs email but in
> the opposite direction. Like push email from server to client.
> With the conditions on the pole, and the tiny vertical antenna on the
> vehicles, it can sometimes be difficult to establish a stable arq
> connection. There are time constraints as well as varying conditions and
> a vehicle that moves up and down a lot.
>
> They are also using iridium but it doesnt work very well and is
> difficult to use so he would like to avoid it as much as possible.
>
> What we could do is have the client send unconnected frames addressed to
> a certain server with a few commands. Provided the user is registered at
> the server then the client could send unconnected frames that can be
> interpreted like:
>
> client->server: get list of my 10 or x latest emails.
> client->server: get my message no x.
>
> The answer to both of these should probably be a short broadcast from
> the server, possibly with a nice and robust mode too. A very robust FEC
> mode would be good here.
>
> This would open up two way email handling also for stations with
> restrictions on use of power (solar powered sailboat for instance).
> The query is short, uses very little power. QRP email :-).
>
> Yes, the negative side of this is that the broadcast from the server can
> be disturbed and an arq connection is of course much better for handling
> emails. But, this new way is extremly fast and consumes very little
> power with the client. Your ideas and worries about this?
>
> 73 de Per,
> sm0rwo
>
>
>
--
Larry Levesque
KA1VGM
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