If you have control over the first program that talks to you COMM port, why not change the program to pass data received from the port to the 2nd program of yours via remoting or any other type of IPC. Better still if you can write a proxy program that connected to the COMM port, and have 2 of the other program talk to this proxy to get the communication done. Another idea is, if you need to sniff only incoming data, you can get a Y-cable (splitter) and connect to 2 COMM port, each program connects to each COMM port.
But you need to make sure the 2nd program is not trying to transmit. Stronghold 2 Kostenlos Downloaden Chip. In some cases you might need a splitter which only connects the RX pin for the 2nd output. Let me know if you need the diagram.
Serial port to network proxy This project provides a proxy that allows telnet/tcp connections to be made to serial ports on a machine. Discover HPCC Systems - the truly open source big data solution that allows you to quickly process, analyze and understand large data sets, even data stored in massive, mixed-schema. Listening to Serial Com Ports that. Or yet another possibility is a Serial Sniffer program (or an open source. (heavy on source code samples) and 'serial port.
If you don't have 2 COMM, you can easily get a USB-Serial Converter for less than USD10. Bufr Decoding Software Satellite.