I do this same thing all the time in order to feed NMEA 0183.X
data to laptops from a single GPS. All I do is go to ratshack
and purchase a number of RS-232 cables with the correct connectors
(DB-9 or DB-25 M or F ) and splice the things together. I have
had no problems running 3-4 laptops off of a single GPS.
One of these days I will get me some chips and slap together a
driver board with 4-5 outputs using RS-232 driver chips to do
the job.
> -----Original Message-----
> From: Robert Foxworth [mailto:rfoxwor1@tampabay.rr.com]
> Sent: 10 June, 2003 08:27
> To: slug@nks.net
> Subject: Re: [SLUG] Capturing /dev/tty1A informaiont (help Ian)
>
>
> This sounds like you are trying to do this all in software,
> but if you have access to the ASCII data on a RS232 connnecton
> (i.e. at the physical layer) you might be able to use a bridge
> tap across the RD and SG lines (sounds like you only need
> to look at incoming data) and feed that to another device
> running minicom/tinyterm on its own RS232 port and just
> keep a capture buffer open to collect the data. Using a bridge
> tap is, I think, out of spec but I've done it; the +12 and -12 V
> for mark and space are pretty forgiving and at this low speed
> double-termination echoes aren't a problem. -Bob F
> PS - a bridge tap has to be built by you. CompUSA doesn't
> carry anything like this.
>
>
> ----- Original Message -----
> From: "Mike Manchester" <mchester@pobox.com>
> To: "slug" <slug@nks.net>
> Sent: Friday, June 06, 2003 20:34
> Subject: [SLUG] Capturing /dev/tty1A informaiont (help Ian)
>
>
> > Here's the scoop.
> > At work we have a software program (tinyterm) that dials
> into a remote
> > site and sends and receives mostly ascii data. What we
> would like to do
> > is echo the traffic through the tty1A (or what ever port
> the modem is
> > on) to a file. In hopes of this will help troubleshoot connections
> > problems. It would be nice if there was a standard unix way of doing
> > this as we really don't want to install software on a
> customers site if
> > it can be helped. Is it possible to do something like this
> using tee and
> > maybe tail -f. We played around with using tail -f /dev/tty1a |tee
> > temp.log but we had no way to close the file thus the data
> was always
> > lost.
> >
> > Any help / suggestions would be appricated.
> >
> > Mike M.
>
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