Re: telnet to Cognex In-Sight 4001 camera

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From	Roy Smith <roy@panix.com>
Newsgroups	comp.lang.python
Subject	Re: telnet to Cognex In-Sight 4001 camera
Date	Mon, 25 Feb 2013 20:44:19 -0500
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In article <71787193-b4aa-438f-a8f1-058873346e27@googlegroups.com>,
 chris.annin@gmail.com wrote:

> On Monday, February 25, 2013 9:02:54 AM UTC-8, chris...@gmail.com wrote:
> > Hello,  ive been struggling with this for a couple weeks now and was hoping 
> > someone might be able to help.  I have an older Cognex camera that I need 
> > to communicate with via telnet.  I can get a response from the camera when 
> > I initiate a telnet session but I dont seem to get any response when I 
> > write the user name to the camera -  I havnt been able to get any response 
> > writing anything.

Two suggestions I can make.

One is to use the command-line telnet utility to talk to the camera.  
Verify that you can at least make a connection and authenticate that way.

Second, use a packet sniffer to watch the actual traffic going back and 
forth to the camera.  On a Unix box, I would do:

$ tcpdump -s 0 -A host 10.31.18.21

but it looks like you're on windows, so you'll want to use Wireshark 
(http://www.wireshark.org/) instead of tcpdump.  If you're not familiar 
with TCP protocol details, you'll want to read up on it so you can 
properly interpret what tcpdump or Wireshark is telling you.

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Thread

telnet to Cognex In-Sight 4001 camera chris.annin@gmail.com - 2013-02-25 09:02 -0800
  Re: telnet to Cognex In-Sight 4001 camera MRAB <python@mrabarnett.plus.com> - 2013-02-25 17:29 +0000
    Re: telnet to Cognex In-Sight 4001 camera chris.annin@gmail.com - 2013-02-25 11:48 -0800
    Re: telnet to Cognex In-Sight 4001 camera chris.annin@gmail.com - 2013-02-25 11:48 -0800
  Re: telnet to Cognex In-Sight 4001 camera chris.annin@gmail.com - 2013-02-25 17:16 -0800
    Re: telnet to Cognex In-Sight 4001 camera Roy Smith <roy@panix.com> - 2013-02-25 20:44 -0500

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