Monitor serial port data traffic

[Raybie]

I would like to write an application to monitor one of the serial port data traffic. What are the possibilities?

[Pierre_63]

I've already done that.It depends on what you want : monitor for a particular protocol (it's easier) or not.
You have to
1) make a piece of electronic to capture the frame between the master and slave (it's an example )
2) make a software with CVI using serial callback function ( for example ) or VISA.
My software was to capture frames, CTS signal, draw CTS,TX,RCV and calculates differents times.