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Probing a COM port

A colleague of mine is using an OMEGA brand handheld thermocouple meter to measure up to four temperatures from his rig. The device has an RS232 computer link to download the real-time data to an application provided with the device. My colleague would like to instead use LabVIEW to interface with the device, but the manufacturers are not willing to disclose information on the communication link. Necessary information such as baud rate, parity or stop bits, or a list of the actual commands passed between the device and the PC.

My question is this: Is there any way that LabVIEW can be used to 'monitor' or 'probe' the existing connection to see how the devices talk to each other? Then, use this information to build a set of vis to do the same job, allowing my colleague to knit the real-time information into his existing LabVIEW codes?

Thanks in advance,

Riggy
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Try Portmon.
Message 2 of 5
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That's great, thanks! Smiley Happy
 
(I realise that LV isn't the best approach to monitoring a COM port, but can I take it that it can't do this?)


Message Edited by Riggy on 03-06-2008 04:28 PM
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Message 3 of 5
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You can't use LabVIEW and another program at the same time to access the same port. You also could not use Hyperterminal and the other program at the same time. This is a restriction placed by the os. Portmon intercepts port communication at a much lower level.
Message 4 of 5
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Very informative, thank you for the info. You are indeed a fountain of knowledge Smiley Happy

Many thanks again,

Riggy
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