[pskmail] Re: pskmail/tty port to PocketDigi, info needed
- From: "John Douyere" <vk2eta@xxxxxxxxx>
- To: pskmail@xxxxxxxxxxxxx
- Date: Tue, 23 Oct 2007 22:33:53 +1000
Vojtech,
I noticed in the archives that you mentioned possible developments with
PocketDigi. I have used your software on my portable device with success. It
is a solid implementation and I would absolutely find it indispensible if
you could make it compatible with PSKmail as you describe below.
Let me tell you why: Australia is a large continent (and island!) and we
have sparce population between the big cities. Therefore mobile phone
coverage is not cost effective at all for the whole continent.
For people who like going away for the weekend, it is very easy to endup in
a place where there is no mobile phone coverage. So from a safety point of
view the usual options are either the satellite phone or HF radio.
This is where PSKMail comes in play. It is a low cost, effective way of
providing a number of key services when you are in a remote, non mobile
coverage location, namely: position reporting (and checking), email (and/or
sms if you use a 3rd party service provider), text web (I use it to
get weather forecasts).
Now, why the PocketDigi compatibility is important to people like me:
when we go four wheel driving for example, I use a mapping software to show
the topographic maps and keep track of my whereabouts (if I need to come
back the same way). This is done with a GPS connected by Bluetooth to the
hand help PC (I use a Dopod unit with WM5).
If PocketDigi could communicate with the radio, I could have in one unit the
mapping and the position reporting facility running without a cumbersome
laptop. A conventional laptop also represents a risk in case of an accident
as its weight makes it a dangerous projectile in the cabin and therefore
requires to mount it more or less permanently.
This is also a great portable solution for people who need it.
The interface with the GPS could be identical to the one used in Linux
through a serial port (real or virtual as with Bluetooth). Regarding the
modem speed, PSK63 as available in PocketDigi is already quite useable for
position reporting and small emails and maybe faster speeds like psk125 or
250 may be added later on if processor speed and other timing issues allow
it.
I am willing to participate in testing of course. My coding is rusty but I
have reasonnable knowledge of C, although not in a GUI environment.
Comments are more than welcome on this project.
73s,
John
> pskmail] pskmail/tty port to PocketDigi, info needed
>
> - *From*: Vojtěch Bubník <bubnikv@xxxxxxxxx>
> - *To*: pskmail@xxxxxxxxxxxxx
> - *Date*: Sat, 25 Aug 2007 09:42:12 +0200 (CEST)
>
> Hi Rein et al.
>
> It seems I somehow finished my adventure with ATS-3a. That little RIG in
> Altoids tin is now able to work some majority digital modes. Now I am
> pondering
> about the next stuff I may load into the PocketDigi software.
>
> I thought about image transfer. SSTV is not practical with the digital ATS
> transceiver because remote DDS drive does not allow fast modulation speed. So
> I
> reverted to the idea of ARQ. I thought about implementing a simple ARQ TTY
> first. I would like to base it on pskmail to make it compatible with it.
>
> As far as I know, there is a protocol whitepaper published at
> http://sharon.esrac.ele.tue.nl/pub/linux/ham/pskmail/ARQ2.pdf Then there are
> Perl sources. I am sure you have extended the protocol quite a lot based on
> your experiments. Would you please document the modified protocol? I know that
> it is all in the Perl sources, but It would be much easier to port it, if
> there
> is a documentation. And maybe there will be others to port it into their
> softwares.
>
> 73, Vojtech OK1IAK
>
>
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