Le 06.10.2012 13:32, Rein Couperus a écrit :
No, it works like a terminal, like a packet node...
Isn't it the "arq" protocol in fldigi ?
Until now I did not see the need for a tcp/ip stack on the client because of bandwidth/speed limitations. But maybe you have a low speed application that could use one...
Nothing specific in mind, I just liked the idea to stick a Hayes-comatible interface on any HF modem. It would eliminate the need for KISS, MKISS and other very specific interfaces.
The protocol on the link is optimized for HF, and does max. 2.8 kB/minute on a clear channel.
This makes 46 bauds. I would need 50 bauds, that's the minimum for usual unix tools:
http://pubs.opengroup.org/onlinepubs/009696899/basedefs/xbd_chap11.html /usr/include/bits/termios.h:#define B50 0000001 Do you think it is possible ?If we could have a tty with 50 bauds connectivity, it would become easy to plug any standard tool.
Rein PA0R Great, never noticed that. Does it work with fldigi as a server ? is there a TCP/IP stack in pskmail ? (There might be something I did not understand... ) Le 06.10.2012 10:06, Rein Couperus a écrit : > Remi, > > you can run a telnet session on HF with any pskmail client. > Just choose any pskmail server you can reach and start the telnet > session with Ctrl-T. > See the screenshot... > > Rein PA0R > > > > > Funny, I was thinking about a similar idea ut for a very different > purpose. My goal was to run very slow Telnet sessions on any > HF-protocol, like these VT terminals we had in the 80s. > > The implementation would have been to use any fldigi modem by wrapping > them in a Hayes-compatible serial port, so that any modem could be used, > with any software plugged on a tty modem. > > One of the difficulties would indeed have been to devise a simple > protocol to send/receive non-alphanum characters such as '@', '<SOH>' > etc... with Morse or Baudot, so that even PPP could run on this serial > port. A simplistic solution would be to use strings such as " at ", and > if these strings appear in the text to transmit, just escape them. This > is an ultra-classical solution. > > Another problem is to implement a simple protocol for error detection, > such as asking for the retransmission strings, or maybe substrings only. > For my personal need, it does not have to be fast (75 bauds or 50 bauds > are perfect) so retransmitting is OK. > > > > > On Fri, Oct 5, 2012 at 2:53 PM, Rein Couperus <rein@xxxxxxxxxxxx> wrote: > > Being a 'CW only' operator, this idea has been one of my pet > projects for some > years... I am thinking about a 'simplified' way to handle this, not > a full ARQ > protocol. I must admit that it is not highest on the todo list, but > I might come up > with some useable code next winter season... > > Some ideas which are on my 'would be nice' list: > * Use a Coherent CW modem for a super sensitive link mode on a > frequency > in the CW portion of the band, running slow but full ARQ pskmail... > Using multiple CW characters to form the complete ASCII 7 set... > > * Theoretically you could now already send short emails without ARQ > connect > using the unconnected APRS email service in pskmail... just switch > fldigi to > receive CW... (only trouble are the '@', '<SOH>' and '<EOT>' > characters...). > > * A separate version of PSKmail called 'CWmail' could use 90% of the > pskmail > system infrastructure with a specialized protocol, and run in the CW > band. > > *ARQ by ear... using your keyer to ask for a repeat... > > ... Meanwhile you can of course use Andpskmail without a laptop > using your > android phone... makes your backpack a lot lighter in weight :-) > > One other idea I have to make the transceiver smaller and lighter is > to use a straight FSK mode on an Xtal controlled transmitter... > > I will take a few extra beers tonite, and do some more thinking :-) > > To realize all these goodies we will need some coding help (Perl for > the server), > as the pskmail project is not finished yet... > > 73, > > Rein PA0R > > > > > > > I love the idea to get portable operators connected! > > vy 73 de Marcus KD0JKM > > > ------- > Sent from my Mobile, please excuse typos. > Phone: 314 884 8697 > > On Oct 5, 2012, at 7:30, Daniel Arseneault <danielarseno@xxxxxxxxx> > wrote: > > > Hi guys, > > > > Just for the sake of discussion, what would you think of adding an > > amazing new mode to pskmail: CW. > > > > Actually, I'm serious. I'm thinking of a CW-to-email gateway that > > would listen for keywords and message body text sent in CW. This > would > > allow mobile ops who can't pack a laptop and ssb transceiver to send > > and receive short emails. Error-correction would be to simply play > > back the email address and message, one line at a time waiting for ok > > confirmation from the client. Full QSK servers could receive > > corrections simultaneously as the message is played back, There could > > be address books, custom abbreviations, heck even webpage fetching > > (short webpages...), there are all kinds of possibilities. All of > this > > done live between a human and a computer. > > > > Here's another discussion on this topic: > > http://www.eham.net/ehamforum/smf/index.php?topic=77975.0 > > > > > >