Null-modem emulator download

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 pairs and use any pair to connect one COM port based application to another. The HUB for communications (hub4com) allows to receive data and signals from one COM or TCP port, modify and send it to a number of other COM or TCP ports and vice versa.

Features

com0com: baud rate emulation
com0com: pinouts customization
com0com: noised line emulation
com0com: paired port settings monitoring (baud rate, data bits, stop bits, parity)
com0com: hiding 'unavailable' ports from user
hup4com: spliting data from one serial device into several virtual serial ports
hup4com: redirecting serial to TCP/IP and TCP/IP to serial
hup4com: RFC2217 - Telnet Com Port Control Option (client and server)

Project Samples

Project Activity

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License

GNU General Public License version 2.0 (GPLv2)

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User Reviews

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★★★★

shraibikus Posted 2020-08-24

Good!
daflame Posted 2016-11-18

For those having trouble gettings the driver to work, you should make sure to install the signed version. Works great. Also, the COM ports do not show up in the Ports (COM & LPT) in device manager. They show up in a new device category for com0com and you can't set the port settings as you can on regular ports. Whether that is good or bad I leave to your own judgement.

3 users found this review helpful.
thevirus1986 Posted 2014-02-17

I found bug :) There is problem when I'm opening one of these virtual port with my app (.NET, VS2008). While second port is open is ok, but when it is closed, main app is 'frozen'. It's 'defrost' in the same time when i opened second port (no data revivied). System is Win7 pro x64
chikatambun Posted 2013-07-02

Good work, the security matter would be omitted on x64 system you can enable/disable testing mode Keep up and raise :-D

Additional Project Details

Operating Systems

Windows, Windows Server

Languages

English

Intended Audience

Advanced End Users, Developers, Testers

User Interface

Command-line, Win32 (MS Windows)

Programming Language

C, C++

Related Categories

C++ Serial Software, C++ Telnet Software, C++ Emulators, C Serial Software, C Telnet Software, C Emulators

Registered

2005-01-24

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