How to Effectively Change Your Computer’s COM Port Number- A Step-by-Step Guide

How to Change COM Port Number

In today’s digital world, communication between devices is crucial, and one of the fundamental aspects of this communication is the use of COM ports. A COM port, also known as a serial port, is a serial communication interface through which data is transmitted between devices. However, there may be instances when you need to change the COM port number for various reasons, such as conflicts with other devices or troubleshooting connectivity issues. In this article, we will guide you through the process of how to change COM port number on both Windows and macOS operating systems.

Step 1: Identify the Current COM Port Number

Before you can change the COM port number, it is essential to identify the current COM port number assigned to the device you want to modify. To do this, follow these steps:

1. On Windows, open the Device Manager by pressing the Windows key + X and selecting “Device Manager” from the menu.
2. In the Device Manager, expand the “Ports (COM & LPT)” category.
3. Look for the device you want to change the COM port number for. The device name will be listed next to the COM port number.

Step 2: Change the COM Port Number on Windows

To change the COM port number on Windows, follow these steps:

1. Right-click on the device you want to change the COM port number for and select “Properties.”
2. In the Properties window, go to the “Advanced” tab.
3. Under the “Advanced settings” section, click on the “Change settings” button.
4. In the “Port Number” field, enter the new COM port number you want to assign to the device.
5. Click “OK” to save the changes.
6. Restart your computer to apply the new COM port number.

Step 3: Change the COM Port Number on macOS

To change the COM port number on macOS, follow these steps:

1. Open the “System Preferences” by clicking on the Apple menu and selecting “System Preferences.”
2. Click on “Serial” from the list of options.
3. In the “Serial” window, select the device you want to change the COM port number for.
4. Click on the “Serial Port” field and enter the new COM port number you want to assign to the device.
5. Click “OK” to save the changes.

Step 4: Verify the Changes

After changing the COM port number, it is crucial to verify that the changes have been applied correctly. To do this, follow these steps:

1. On Windows, open the Device Manager and expand the “Ports (COM & LPT)” category.
2. Look for the device you changed the COM port number for and check if the new COM port number is displayed next to the device name.
3. On macOS, open the “System Preferences” and click on “Serial.” Verify that the new COM port number is displayed in the “Serial Port” field.

By following these steps, you should now have successfully changed the COM port number for your device. Remember that changing the COM port number may require you to update any software or drivers that rely on the specific COM port number, so make sure to consult the documentation for any connected devices or applications.