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000279_dold@38.usenet.us.com_Mon Dec 31 20:05:44 EST 2001.msg
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Article: 13109 of comp.protocols.kermit.misc
Path: newsmaster.cc.columbia.edu!news.cs.columbia.edu!peerfeed.news.psi.net!unlisys!news.snafu.de!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!cpk-news-hub1.bbnplanet.com!sanjose1-snf1.gtei.net!news.gtei.net!news.mainstreet.net!wasp.rahul.net!samba.rahul.net!rahul.net!a2i!dold.a2i!dold
From: dold@38.usenet.us.com
Newsgroups: comp.sys.sun.admin,comp.unix.solaris,comp.sys.sun.hardware,comp.protocols.kermit.misc
Subject: Re: Sun Serial-Ports (and GPS)
Date: 31 Dec 2001 23:52:32 GMT
Organization: Wintercreek Data
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In comp.protocols.kermit.misc Frank da Cruz <fdc@columbia.edu> wrote:
: You have to consider at least the following:
: 1. Making sure the serial port is configured, set up, enabled, etc.
: This is Solaris sysadmin stuff.
I would debug this using known sources, like a second serial port on the
same or different Solaris machine direct-connected, or maybe a Windows
machine running some serial software (Kermit-95 ;-)
: ranging from full modem control to three-wire (no modem control).
My Garmin eTrex has only three connections. GND, TX, RX, and I don't think
it does flow control.
: 3. Using an appropriate cable.
I'd test that with a windows machine, before moving to the Solaris box.
Kermit-95 reads the NMEA sentences just fine.
: You've received a number of answers on 1-4. For further info look at:
: http://www.stokely.com/unix.serial.port.resources
For cabling info, try http://www.pfranc.com
: in line with the data). If the GPS offers no mechanism for flow control,
: you'll need a process constanty reading from it.
I think the sentences come every second, and they aren't that large. At
4800 baud, it's not difficult to grab it all.
: Anyway, once you are able to see the GPS messages, then you can program
: Kermit (using its script language) to process the messages and do whatever
: you like with them: log them to a file, accumulate statistics, send alerts
: by email, pager, or whatever. To get started with Kermit scripting, see:
Kermit is handy, and I've used both Kermit-95 and Solaris Kermit to monitor
NMEA strings.
You didn't suggest what the real goal is, but there are many fine programs
for doing things with the NMEA data. Of course, most of them are Windows,
but there are some Macintosh, and a Java based system as well. I haven't
used any, but you might look at http://joe.mehaffey.com or
http://home.earthlink.net/~cwkelley/ or
http://www.wsrcc.com/wolfgang/ ftp area.
Also, look at the newsgroup
sci.geo.satellite-nav
--
---
Clarence A Dold - dold@email.rahul.net
- Pope Valley (Napa County) CA.