Free RS232 Monitoring software?

Hi there,

Anyone knows a free software for Monitoring /data-log a serial link between a PC and a device?
If possible I would like to do it software-wise, ie. without having to make a special cable to hijack the serial link.

Thanks in advance,

Loic;

microsoft have sample called TTY try it out:
Serial Communications in Win32

Cheers

Thanks golanshahar,

I had a quick look at the TTY, compiled it and started it.
However it seems I can't connect to a serial port if some device is already connected to it.

If that is so, how can I then spy on the data-flow bewteen my PC and the device with the TTY sample?

Cheers,

Loic.

well if other application is connected to COM1 alreadly of course you will fail on the ::CreateFile(..) api.

monitoring the data that another application sending to the COM1 is not that trivial as i know. one way is to use API hooking and hook the ::WriteFile(..) , ::ReadFile(..) maybe also ::DeviceIOControl(..) and that way you can monitor the data transfer there.

maybe there is another (easy way) but i dont know.

Cheers

Hi loic,

is this what you're looking for ?

http://www.sysinternals.com/Utilities/Portmon.html

Greetings,
Matze