Hi,
Some of you may remember using soldering iron when trying to establish Modbus RTU with PcVue, from A to Z.
Now, you can use this protocol without any cable and even without physical serial port (or through converter).
What you need:
https://freevirtualserialports.com/
mod_RSsim or mod_RSsim2
Please pay attention on the software license agreement if any.
A few pictures will explain it better:


