The Null-modem emulator (com0com) is a kernel-mode virtual serial port driver for Windows. One piece english dubbed 575.
0
0answers
How to get application side port settings for a com0com pair?
Task:Redirect a serial communication over network (eg. TCP/IP) without knowing app specific serial port settings beforehand.Problem:com2tcp or apps like that enforces server side serial device ..
0
0answers
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 ..
1
0answers
Any way to lockdown a virtual comm port to a specific baud rate?
I'm using com0com for virtual comm ports.I'm trying to test some software, whereby I am replacing a bunch of physical com ports with virtual ones. The software check through each one a determines it ..
1
1answer
How to make com0com ports appear as real physical port?
After creating a port pair using com0com, they appear in the com0com section of device manager. A bad behaved application (the source code and developers are not accessible) only list certain ports ..
0
2answers
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 ..
0
1answer
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 ..
1
2answers
com0com virtual port does not open by UWP
var selector = SerialDevice.GetDeviceSelector('COM14');var informations = await DeviceInformation.FindAllAsync(selector);if (informations.Any()){ var port = await SerialDevice.FromIdAsync(..
2
3answers
Creating a pair between a real and virtual serial port
I am working on a utility that automates the testing of a legacy application. The legacy application runs on Windows 2000, and uses 3 devices connected via serial (COM) ports.I have access to the ..
0
1answer
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 ..
0
1answer
Accessing virtual com ports inside a WS2016 docker container
Running on a Win7(host) and Virtual Box with Windows Server 2016 TP5(guest vm). On WS2016 i run docker, using the windowsservercore base image for the containers.I'm trying out kind of a fleet ..
1
0answers
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)..
0
1answer
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 ..
2
0answers
How to catch com0com IO-CTL commands?
I have two connected virtual COM ports (ex. COM0 and COM1), created by com0com driver. Some old application (App1) writes data to COM0 and I read it from COM1 (in App2) and vice-versa. How can I ..
1
1answer
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 ..
2
1answer
application hangs when closing a listening port
I'm using com0com to create a part of virtual ports comA/comB, typing the input to comA from hyperterminal and listening on comB in a wpf application. When I run the following code (by triggering ..
153050per page
I tried to install com0com - a null modem emulator - on Windows Vista, but failed because Windows Vista doesn't let me install a driver that is not digitally signed.
I followed these instructions found in the readme file:
- Inactivate UAC
- Run
bcdedit.exe -set TESTSIGNING ON
- Reboot the computer.
JonasJonas
3 Answers
Try running
bcdedit.exe -set TESTSIGNING ON
in an administrator command prompt (Run as Administrator). Or try: http://www.ngohq.com/home.php?page=dseo instead.BloodPhiliaBloodPhilia
Is 32 or 64 bits Vista? I remember reading in the OSR mailing list that unsigned drivers can not in any way be installed in vista 64 bit.Hope this helps.
jrbjazzjrbjazz
For anyone having the driver signing issue on Windows 8, the
bcdedit
answer above doesn't seem to work because Windows 8 has some sort of new Secure Boot policy that prevents running that command successfully, even as admin (on my machine, at least).What worked for me was running
shutdown /r /o /t 00
as admin, then selecting Troubleshoot
, then Advanced options
, then Startup Settings
. Click the Restart
button to restart and enter the Startup Settings
menu, then select option #7 (Disable driver signature enforcement
). After restarting, Windows should now allow installation of the com0com
drivers (though it shows big warning messages that the drivers are untrusted).(I found the details on getting into the advanced startup settings here.)
jjlinjjlin
Setup For Com0com
Not the answer you're looking for? Browse other questions tagged driversinstallationwindows-vistacode-signingnull-modem or ask your own question.
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 60.
I have added my test certificate as both a root and trustedprovider using the following commands:
And verified that it is listed under both locations.
I then run the newly built setup.exe. This installs the signed com0com.sys file into C:WINDOWSsystem32DRIVERS and sets up a pair of virtual serial ports and a bus between them. Using explorer, I go to the DRIVERS directory, right click on the com0com.sys file and verify that it has the 'test' digital signature. I then go into Device Manager, open the 'com0com serial port emulators' entry, pick an entry and do Properties->Driver and see that it says 'Not digitally signed'. I click details for the driver and can see that it is referring to the com0com.sys driver file that I just confirmed is signed.
I found what might be a related issue but I'm not sure. Does WinXP demand a WHQL signature? If so, does that explain why the com0com.sys file is signed but the device driver entries say they aren't signed?
Community♦
AndrewAndrew
Com0com 64 Bit Download Signed
1 Answer
Yes, when talking about drivers, Windows 2000 and Windows XP has only one certain signature in mind -- the WHQL signature. Without putting the com0com driver through the WHQL process, it simply won't be considered signed.
The instructions in Building.txt in relation to signing are talking about a different 'constraint' placed by 64-bit editions of Windows Vista and higher -- they simply won't load drivers which are not signed at all -- but that's unrelated to your problem.
IlyaIlya
Not the answer you're looking for? Browse other questions tagged windows-xpdevice-driverwindows-2000driver-signingcom0com or ask your own question.
I have installed, apparently successfully, com0com v2.2.2.0 on a 64bit Windows 7 machine.
I run the command utility, like this:
Note: logged as 'in use' is NOT an error message?
Then I try to open COM8 like this
This fails with
Download Camfrog freeware live webcam video chat room software that works behind a router or firewall.
Download Camfrog Video Chat for Windows now from Softonic: 100% safe and virus free. More than 810 downloads this month. Download Camfrog Video Chat. Sorry, but it seems like your browser Welcome to Camfrog! The largest online video chat community on the Internet. Chat with any of our 196,988 members.
I have tried both 'COM8' and
'.COM8'
.Com0com Download
Note that the exact same call to CreateFileA works perfectly on a 'real' COM port.
Q: Can someone tell me what the problem is?
A: On windows 7 64 bit you have to enable testing of unsigned drivers.
- Run a command prompt as administrator. ( It is not enough just to run from an account with admin privileges. See here for details of how to do this. )
- Type in the command
bcdedit -set TESTSIGNING ON
- reboot. ( Windows will place a 'test Mode' note on the bottom right of the desktop ) Best american football games for pc.
For Windows 8 this method does not work satisfactorily or easily. Here is some discussion of the issues and workarounds.
Alternatively you might want to try a signed version - I have NOT tried this myself.
ravenspoint
ravenspointravenspoint
2 Answers
Here are my points:
- Microsoft requires
64-bit drivers
to besigned
. com0com.sys
(64bit) is a mere unsigned kernel-mode driver.
SoftWx has written an interesting tutorial on installing it on a 64 bit Windows 7 machine. You can fetch it here.
menjarazmenjaraz
In case anyone is referencing this, and interested in this topic, the 2.2.2.0 version of com0com is signed for 64-bit Windows. This removes the need to jump through the hoops of putting Windows in 'test' mode.
hatchethatchet