Com2tcp
Com0com, The Null-modem emulator (com0com) is a kernel-mode virtual serial port driver for Windows. You can create an unlimited number of virtual COM port. If there is a requirement to capture serial data from another application on the same PC, the Null Modem Emulator (com0com) from may.
Null Modem Emulator (com0com) Null Modem Emulator (com0com) If there is a requirement to capture serial data from another application on the same PC, the Null Modem Emulator (com0com) from may be installed. This provides linked pairs of virtual serial ports, ie COM21 is linked to COM22, so any data sent to COM21 arrives at COM22. This avoids needing to use a pair of physical ports and a null modem cable. It might be used for capturing serial printer data. The information that follows is from the com0com readme file that may be found in the files com0com-i386.zip (for Windows 32-bit) andcom0com-x64-signed.zip (for Windows 64-bit) in the ComCap install directory. Note com0com is an open source project and has not been tested by Microsoft WHQL, so skip the security alerts that appear during 64-bit installation.