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Questions tagged [com0com]

The Null-modem emulator (com0com) is a kernel-mode virtual serial port driver for Windows.

The Null-modem emulator (com0com) is a kernel-mode driver for Windows.

64 bit version of the driver is only test-signed not signed as usually Microsft requires.

You can create an unlimited number of virtual COM port pairs and use any pair to connect one COM port based application to another.

resources:

  • com0com's site on Sourceforge
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Closing Windows (virtual) Serial Ports - how long does the OS take to free them?

I am writing a Python (2.6) app which is making use of com0com virtual serial ports. It is running on Windows Server 2008 R2 (sp1) (I am also seeing the same issue on my dev machine which is Win 7). The com0com port pairs are created prior to the…
azp74
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OBDSim Connection with Android Device over Bluetooth on Windows 8.1

I have worked since last day on this topic. I want to develop android application about obd-ii scanner. There are many open source project on Github or Google Codes. I have to find obd-ii simulator to developed this application without car or any…
MSalihKarakasli
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Create and test virtual serial ports with com0com and hub4com

I'm working on sending datas via COM in C++ for ESPA 4.4.4. A program B connected on a COM port normally detects if the program A sends datas. To test this I have created two virtual ports pair with com0com, COM1/CNCB1, COM2/CNCB2. With hub4com I…
Mr. Starck
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C#: Wrapping SerialPort.BaseStream in StreamReader seemingly unable to deal with only CR as NewLine

I ran into an issue with communication over serial ports using C#, .NET Framework 4.8 and com0com virtual bridge (I do not believe the last one actually matters). The implementation that I am using uses only CR without LF as a line separator and the…
Martin Záleta
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Creating A Virtual RS-485 Null Modem

I'm in the processes of developing a RaspPi program that will be responsible for data-logging sensors on an RS-485 based Modbus network. Development is being performed on a virtual machine running Linux on top of my windows laptop. Currently the two…
4DoorToyota
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Serial Port Communication problem while using UART

I'm trying to send and receive data between a board (Dialog DA14531) and a simulation application of a temperature sensor. I can easily send and receive data between the board and my computer, using Termite for instance. By using Com0Com, I can…
Hamidd Hosseini
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Com0Com create ports from command prompt

How to create virtual ports with Com0com command prompt with specific port name? For example, I need to create COM11 and COM15. When I run next command if there are not any virtual ports it creates ports COM3 and COM4 install RealPortName=COM11…
Dmitry
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UWP doesn't connect to virtual serial port

I will not be able to access the hardware I'm programming with sometimes or it's just not good to debug. So that's why I thought to make my life a bit easier and work with a virtual serial port. I chose to use com0com since it's pretty straight…
Daniel
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com0com silent install (test signed com0com.sys shows up as signed in explorer but not in Device Manager)

My goal is to have the com0com serial driver install without popping up the install wizard on both WinXP and Win2000. I am working on WinXP x86. I have followed the test signing instructions for the com0com driver, replacing amd64 with i386 at line…
Andrew
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Unresponsive Windows if nothing is picking up COM port data

I made a Delphi application that transmits data to COM port every second. The COM port is a virtual null-modem (com0com) between the data transmitting software and a VirtualBox machine. Everything is fine, but if nothing is listeninig at the other…
Paul
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com0com and pyserial virtual serial ports. Can this be used to simulate unplugging a serial usb device?

I am using com0com and pyserial. I open one port, write to it using pyserial and read from it in the YAT emulator. This works great. Can this setup be used to simulate unplugging of a usb device that is emulating a serial port? I want to recreate a…
Impostor Syndrome
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Setting com0com friendly names

I'm working on a project including a pair of virtual comports by com0com. I need to change the friendly names from "Com0com - serial port emulator xxxxxx" to something I wrote my self. I found the Updatefnames command in com0com v3.0.0, but I cant…
Kåre Rasmussen
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com0com RS232 terminal Java program

I made a Java program that runs on a computer with two RS-232 ports. It works pretty good. I connected two devices that communicate with each other through RS-232. I put the computer between the cable. You can see everything getting send on a…
Berty
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com0com intercept opos printer x is offline

We are trying to intercept data between pos and printer. The problem we have ran into is the POS reports the printer x is offline when we connect it to com0com endpoint. an instance of hyperterminal on each side of com0com endpoints do communicate…
Leblanc Meneses
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How to know when com0com port installation is complete?

I am writing InstallAware script which installs com0com, creates several COM ports and also installs my application which uses those ports. To create ports I run setupc.exe install with some options. Setupc does its job and quits very quickly. After…
user2085842
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