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I am looking for a software that would fulfill the following requirements:

  • Able to "sniff" communication over RS232 (like PortMon and Advanced Serial Data Logger)
  • Able to listen to a given address/port for TCP/UDP broadcasts (like Hercules)
  • Optionally could "sniff" IEEE488 communication
  • Optimally would be free

Is there such a magical tool?

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closed as off-topic by Daniel R Hicks, random Aug 31 '14 at 3:38

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Questions seeking product, service, or learning material recommendations are off-topic because they become outdated quickly and attract opinion-based answers. Instead, describe your situation and the specific problem you're trying to solve. Share your research. Here are a few suggestions on how to properly ask this type of question." – Daniel R Hicks, random
If this question can be reworded to fit the rules in the help center, please edit the question.

You didn't say what OS you're using.

For Linux, try socat or graag's SockSniffer on the /dev/ttySx device which represents the serial port:

For Windows, there are many solutions available with a basic Google search.

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