Monitoring Serial Connections

[jottiwell]

Hi,

Has anyone any idea whether it's possible to monitor what data is being passed through a serial port?. I realise I can use MSComm to control input and output, but how about if I just want a vb program to echo whats being sent / recieved to the screen? ( effectively a 'peek' command that would read the I/O buffers but not take anything out of them ). I'm trying to control a serial driven wall display board but haven't got any technical information as to protocols it expects etc, however I do have the original control program, I just can't tell what it's doing.

Thanks

[eedhto]

Hi,

I am looking for the same thing. Have you found anything so far? Please let me know because I have a device that communicates with a VB application in my software but I have no clue what commands do they excange. I would like to replicate the same software on my own.

Waiting for your advice.
Thanks,
H.

[Phenglai]

To the best of my knowledge you can not listen in on the comm port if you program is not connected to it. If there is a way I would love to know but I have never seen one.

You could listen to the comm port by connecting it to a second comm port. This way tou could see what was going out from the program you mentioned. Once you had the commands you could send them from the new VB program and then you would see what the device returns.

Phen