MODE Command Doesn't See COM Ports in Windows 11

Abstract: Having trouble with the MODE command not seeing serial ports in Windows 11? Learn about possible causes and solutions to resolve this issue and get your devices connected.

Created: 2025-02-11 by UserComp.com Editors

Win11 CMD: Serial Ports Not Visible

I'm working on Win11 and running CMD. The MODE command doesn't seem to see serial ports. I'm sure the port exists, because software that can connect to the port sees it, however, it seems to be invisible to the MODE command.

Possible Solutions

Check if the port is enabled: Go to Device Manager, expand the Ports (COM & LPT) section, right-click on the serial port, and select Properties. Go to the Port Settings tab and make sure that the Enable Port checkbox is checked.
Check if the port driver is installed: Go to Device Manager, expand the Ports (COM & LPT) section, right-click on the serial port, and select Properties. Go to the Driver tab and make sure that the driver is up-to-date.
Check if the port is assigned a COM number: Go to Device Manager, expand the Ports (COM & LPT) section, right-click on the serial port, and select Properties. Go to the Port Settings tab and make sure that the COM Port box is populated with a number.
Check if the port is configured correctly: Open the Registry Editor (regedit.exe), navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SerialClasses, and make sure that the port is configured correctly.

References

Books: None
Articles:
- Serial Communications Properties
- Windows 10 Serial Port Not Working: 5 Solutions to Try
Online Resources:
- Microsoft Serial Port Driver for Windows
- RealTerm - A terminal emulation software for serial communication.

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Tags: Windows CMD COM Ports MODE Command

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