Serial RS232 between existing Instrument and reading software provider

Hello.  I have an instrument with software supplier for the acquisition of data from the instrument to a PC through serial RS-232 communication.  I would like to acquire data in LabVIEW instead of via the provider software.  The seller has given virtually no support to help me find a way to communicate with the instrument - they offer only their software as the only solution.

I'm trying to find a way that I can transfer data with provider software and basically understand the format of the communications and the commands that are required to send to the device.  Two things that seem like possibilities are:

(1) use a type of "spyware" or "monitor" for serial ports to capture and display the communications that occur between the instrument and the PC/software.

(2) connect the COM1 port, from my PC (by which the software provider would communicate) to COM1 port on my computer and the insrument for a 3rd COM port on my computure.  Use hyperterminal or LabVIEW to read it as the instrument and software try to pass each other by reading iteratively to a port and then in writing as to the other port.

No one has tried this before?  Any suggestions on who could work or work better/easier, or any other ideas?  I don't even know the port required parameters (baud, etc.), so I need to guess at those if I tried option (2), above.  I've never used any software serial port "monitor" before, so I don't really know what to use or else it might work for option (1).

Thank you.

Hello

As mentioned, Microsoft Portmon's looks like your best bet.  Here is a link to where it can be downloaded:

http://TechNet.Microsoft.com/en-us/Sysinternals/bb896644

Tags: NI Hardware

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