[rrd-users] Re: Graphing Data from win2k / RS-232 Serial Cable ??

Patrick Bartkus patrckb at hotmail.com
Mon Apr 23 14:59:11 MEST 2001


>From: "Reinhard Weissenbrunner" <reini at leox.net>
>hi, all,
>I´ve been testing RRD-Tool a few days now, and I have to say:  Wow  ;-o
>cool tool..

It is an amazing tool isn't it.

>But what about all the other data which can be graphed over time, like
>temperature, pressure
>and all the other technical Stuff where we can get data from ?

All these could be captured and graphed.

><The first Experiments>

Congratulations on your first graphs!

><The next step.>
>The next step ahead is: collecting the data "automatically"..

Oh boy, oh boy! Here is where your knowledge will get to grow. You are going 
to get to learn some great perl in doing this.

>Im sure, this small problem has been coded in perl many times,
>so, why re-event the wheel.?.
>Could you please give me some hints/tips to a "greenhorn" ?

I suggest the "Perl Cookbook" by Christiansen and Torkington. It is good 
reading to go through just to see new and more advanced techniques are done 
and has a lot of real-world examples that you can cut and paste into your 
own scripts.

><And now, the Challenge>..
>There are many Technical  Measurement-Instruments with a
>"RS-232" Interface... so, why not obtaining data via  "serial cable" ?
>Or can you give me some hints, where to start, when listening to a "Serial
>Cable" ?
>where are the "hurdles" which are awaiting me ?

You are adventurous!

Serial port programming is probably one of the most challenging of all the 
"network-type" programming. I've attempted just enough "for fun" to know I 
didn't have the time to try and work out all the issues.

A lot will depend upon the device to which you are connecting. It will 
depend upon how forgiving it is on which RS-232 signal is present when. It 
will also depend upon the serial port out which you are speaking. What I was 
attempting was using an old desktop PC, loaded Linux on it, and wanted to 
use the COM 1 serial port to talk to a console port of a device. I ran into 
many issues of locking up the console, locking up the Linux box, etc, etc.

Here is one link to a Linux Serial How-to: 
http://www.linuxdoc.org/HOWTO/Serial-HOWTO.html and then here's another 

You've got some great ideas, Reini. Keep plugging on the perl skills and 
you'll be writing those really fun scripts in no time!

Patrick Bartkus, CCNP Certified	Sr. Network Support Analyst
Fleet Mortgage (soon to be Wash. Mutual)    Columbia, SC
If truth was not absolute, how could there be justice?

Get your FREE download of MSN Explorer at http://explorer.msn.com

Unsubscribe mailto:rrd-users-request at list.ee.ethz.ch?subject=unsubscribe
Help        mailto:rrd-users-request at list.ee.ethz.ch?subject=help
Archive     http://www.ee.ethz.ch/~slist/rrd-users
WebAdmin    http://www.ee.ethz.ch/~slist/lsg2.cgi

More information about the rrd-users mailing list