How to intercept data from com port and change it?

Question

Computers

Good afternoon!

There is equipment that transmits data to the program through the com port. It writes this data only after saving the document.

It is necessary to intercept data from this com port ----> change them manually ----> send them to the program.

What programs can be used to do this?

Answer 1

Use one of the many programs for working with comport, there are many sniffers and virtual ports, you read from one you send to the second, the program itself must read data from the second.