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Question edited.

Need to understand the serial communication protocol between a USB device and PC, that uses serial over USB communication. I was planning on using a software based approach for serial port sniffing / monitoring / logging the serial communication.

My constraint is availability of PCs running Windows 7 64-bit only, and none of the methods I have come across work on this setup. Here are some that I've tried:

Looking for alternative ideas, approaches ? Hardware based approach would not be my first choice, but anything that can be done at a low-cost, or better still -- DIY, I'd love to hear more.

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Do you want to use a Hardware logger? – Amirreza Nasiri Sep 1 '13 at 9:41
1  
@moses, done. Hopefully it is no longer a product recommendation query. OTOH, I hope an answer can be valid with a product recommendation, as a solution. – icarus74 Sep 1 '13 at 17:23
    
@AmirrezaNasiri, if those are the only working alternatives, then I could go for hardware logger. Hardware loggers for USB-based devices (even though they use serial over USB), I think - are both complex and expensive, no ? Anyhow, open to suggestions. – icarus74 Sep 1 '13 at 17:23
    
@icarus74 i know several open sources with different capabilities and for different tasks. You need serial port sniffing/monitoring soft for individual tasks or for enterprise ? – Ice Oct 18 '13 at 12:23
    
@Ice, for individual task back then. Although I am no longer working on the project, it'd still be good to know what the options are. – icarus74 Oct 7 '15 at 6:10
up vote 13 down vote accepted

I think the best way to understand the serial communication is with special software( as you were planning). You need to sniff and monitor serial port ? And with windows 7 x64 support.

Then try this soft - Eltima Serial Port Monitor: http://www.eltima.com/products/serial-port-monitor/

It can analyze and monitor all serial port activity in a system. Besides, with serial port sniffing.

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You forget to add : App is not free. But with free trial. – Ice Oct 18 '13 at 14:32

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