On 2011-05-01 17:14, Joseph Apuzzo wrote:
Yup saw that article.
I guess what I want, which I can't find is the following:
1) Taken cheap/affordable GMRS radios ( can get a pair of 36-Mile ones
for around $70 )
2) Build a Modem that does 9600bps (
http://www.amsat.org/amsat/articles/kd2bd/9k6modem/ ) or can the
software one be used?
The software method I was discussing earlier used the sound card for
doing AFSK, but the faster 9600 baud used at 70cm an up uses FSK rather
than AFSK, so I'm not sure if it'll support that or not.
3) Then create a Linux stack that in effect can pass information in
a diaspora kinda way, some sort of ad-hoc mesh routeing that can include
the Internet.
Okay, something to keep in mind is that anything sent over packet radio
must be non-encrypted. However other than that one concern, the
hardware to do what you want already exists. For instance, one of the
things I tried in the mid-90's was sending "packet email" of sorts to an
packet <-> internet gateway that was located in Arizona. It slowly got
routed between nodes somehow until it got to the packet gateway, then
was sent out via email over the internet.
That's the good news; the bad news is it took an entire week. I was
amazed it worked at all, tell you the truth -- but it worked on the
first shot.
These days there are likely far more packet <-> internet gateways
available (that are closer by), or it may be easy enough you could build
your own (because these days internet access is far more available than
it was back then) -- so you can definitely do what you're thinking of
trying. It's just a matter of the details of specifically how to do it.
That is let's say the hardware existed ( humor me )
Could a old school "store and forward" mesh/ad-hock network be created?
Then could that said network be used for emergencies ( Think
http://sahanafoundation.org/ ) when needed
and development/socialization when not? ( Think
https://joindiaspora.com/ ). It would also need a layer that could route
on and off the existing Internet. That is it would be kinda cool to do
thinks like what OLPC does with it's routeing ( Think
http://www.teleread.com/ebooks/could-olpcs-mesh-net-work-in-us-rural-areas/ )
So I guess we start building the modem first then coding the stack?
I think it's mainly "just the modem" you need to worry about. The rest
has to do with details and understanding of how Packet Radio works and
how the various packet radio systems can be used.
--
-- Chris
--
Chris Knadle
[email protected]
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