How to Find / Change A COM Port (Windows)

At certain times we need to figure out which device is connected to which COM port, so we can tweak the settings to our liking (such as changing the BAUD rate, switching the port to another one, etc…) or even for finding out which port you want to connect to.

In Windows, this very simple process will help you identify your COM port:

1. Press Start on the start bar.
2. Select Run…
3. Enter “devmgmt.msc” and select Ok.

1. Under the Device Manager window, expand the Ports category.
2. Identify your devices.
3. The COM port listed in the parentheses is the port you’re looking for.

To change the COM port the device is using, start with the steps listed above, then:

1. Right-click the COM port.
2. Click Properties.
3. Select the Port Settings tab.
4. Click Advanced.
5. Change the COM Port Number by selecting a different port from the list of available ports.
6. Click OK.
7. Click OK on the Properties window.

The changes won’t show up right away (but they will take effect). If you restart Device Manager you’ll see the new assigned COM port. Article written by a system integrator.