Is there in the market a device that allows me to log (to a third serial port) a serial communication between two peers?

Also it would be great if such device detect the baud rate and other parameters of the communication.

 

Break Out II. We use this for debugging plc protocols.

 

Yes. I think you have two options.

1. If one of the serial devices is a PC you can run some monitor software which will look at the port which is being used and display the data. There are a few out there - have a look at "http://www.hhdsoftware.com/sermon.html#Overview":http://www.hhdsoftware.com/sermon.html#Overview

2. Using a special 3-way cable you can split the comms off to a third PC/device. Look at the brochure for Greenleaf Async software & cable at "http://www.gleaf.com/VCS/Downloads/Brochures/VCS ASync Brochure.pdf":http://www.gleaf.com/VCS/Downloads/Brochures/VCS ASync Brochure.pdf

 

Yes
I have used a software package called DataScope that runs on a PC with two serial ports. It takes everyting from port A and redirects it to port B, to the screen and optionally to a file.

It works great for debugging serial protocl software.

Do a Lycos search to locate it on the net, it was shareware when I used it about 3 years ago.

Russ

 

You should look at Frontline Test Equipment "www.fte.com":http://www.fte.com
They make a serial data analyzer for a PC. One of the features is to be able to monitor the data streams (both ways) and log them to a file. It is bit pricey ($1500) but works very well plus gives all the lead conditions and serial data information you wish. We use it extensively in our wireless data business to troubleshoot customer problems with serial communications.
Hope this helps.
Harry

 

Can you dig up an old DOS PC that has two serial ports? Download RS232101.ZIP from somewhere on the WWW (try here: "http://www.programmersheaven.com/zone16/cat429/14084.htm":http://www.programmersheaven.com/zone16/cat429/14084.htm ). Build the cable detailed in the included documents. To make it easier use one of the serial port breakout adapters sold at Radio Shack. If you look on the web, you can find 486 based laptops for next to nothing.

This software allows one serial port on the DOS box to listen to the RX line and the other to listen to the TX line of the serial link you want
to observe. You get the full display of all characters that go through the link in both directions without changing the communications at all. The display is the same as the HP protocol analyzer I once used. You can see what passed each direction as well as when it was sent relative to the other communications.

This is a great program, and it has really helped me in the past. It is shareware, but I was never able to get the author to respond to attempts to pay him. The software does not time out.

I hope this helps,

Ed

Speaking for me, not for Starbucks. . .

 

A PC running snooper should be able to do this.

Mark
Any opinions expressed in this message are not necessarily those of the company.

 

Did you try Eltima's com port monitor?
http://www.eltima.com/rs485-sniffer.html

 

Here's a pretty good option. http://www.aggsoft.com/serial-port-monitor.htm. The RS485 mode is available too. Allows to test MODBUS commands with plugins.