Application to monitor/free up COM ports

[zephyran]

Does anyone know of an application that can do one or both of the following:

1. Tell which process has locked a system's COM port(s)
2. Forcibly unlock a COM port that has previously been locked by a process

We're trying to help troubleshoot a custom program written for our company and this would go a long way toward fixing some issues we're having. Thanks!

There's no "I" in "TEAM".
But there's no "U" either.
So if I'm not on the team, and you're not on the team, then nobody's on the team!

 

[linney]

Just a few semi-related articles and links, see if any point in the right direction.


Troubleshooting Serial Port Problems in Windows

http://support.microsoft.com/default.aspx?scid=kb;en-us;105940&FR=1&PA=1&SD=HSCH

Available switch options for the Windows XP and the Windows Server 2003 Boot.ini files

http://support.microsoft.com/default.aspx?scid=kb;en-us;833721&FR=1&PA=1&SD=HSCH

Overview of the COMDisable Tool

http://support.microsoft.com/default.aspx?scid=kb;en-us;819036&FR=1&PA=1&SD=HSCH

Com 3 port
thread779-1018396

131976 How to disable detection of devices on serial ports

http://support.microsoft.com/default.aspx?scid=kb;EN-US;131976

See if these lead anywhere?

HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\SERIALCOMM

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Ports

Search the Registry for COMn (n = number) and see what else you can turn up.

 

[zephyran]

No, none of those helps. I'm looking for an app that can tell which programs are using the system's COM ports, and/or can be used to forcibly free up those ports from the app(s) that have locked them.

There's no "I" in "TEAM".
But there's no "U" either.
So if I'm not on the team, and you're not on the team, then nobody's on the team!