Standard Serial over Bluetooth link (COM27) Driver

The Standard Serial over Bluetooth link (COM27) driver lets Windows present a compatible Bluetooth serial connection as a virtual COM port, allowing software to communicate with a paired device. This Microsoft Windows component is useful for connecting Bluetooth-enabled instruments, GPS receivers, and other equipment that uses the Serial Port Profile (SPP). COM27 identifies the assigned port, not a separate physical adapter or unique hardware model.

Key Features

• Virtual serial communication: Enables applications that support COM ports to exchange data with compatible Bluetooth devices.
• Windows integration: Works with the Windows Bluetooth stack and a functioning Bluetooth adapter driver.
• Support for legacy equipment: Helps serial-based utilities communicate wirelessly with devices that offer Bluetooth SPP.
• Port identification: Makes the connection available as COM27 so you can select the correct port in your application.

How to Install Standard Serial over Bluetooth link (COM27) Driver

1. Check your system and device. Confirm your Windows version and whether it is 32-bit or 64-bit. The listed supported systems are Windows 10, 8.1, 7, Vista, and XP; the Bluetooth adapter and remote device must also be compatible.
2. Choose a trusted source. Before starting a Standard Serial over Bluetooth link (COM27) driver download for Windows, check Windows Update and the Bluetooth adapter manufacturer’s support resources. This Microsoft component is typically supplied through Windows rather than as a standalone COM27 installer. A free download should not require a paid driver-updater subscription.
3. Install or update the Bluetooth adapter driver. Use the appropriate package for your adapter and operating system, then restart if prompted. Avoid installing a package solely because its description mentions COM27.
4. Pair the Bluetooth device. Enable its serial service if required, then check Device Manager under “Ports (COM & LPT)” for the assigned Bluetooth serial port. Windows may assign a number other than COM27.
5. Configure and test your application. Select the assigned COM port and any communication settings specified by the device manufacturer. If the connection fails, verify pairing, serial-service availability, and adapter status.

Keep the driver updated through trusted Windows or manufacturer channels, choosing the latest version compatible with your system rather than simply the newest package available. For Windows 10/11 searches, note that Windows 11 is not included in this page’s listed support; verify compatibility separately before you install. Older Windows releases may have limited update availability.

Common Issues and Fixes

• COM27 not detected: The Bluetooth device is paired but the Serial Port Profile (SPP) service is off. Remove and re-pair the device, then open its Properties > Services and enable “Serial Port.” Confirm COM27 appears under Device Manager > Ports (COM & LPT).
• Driver install fails or shows Code 10/28: This is usually a stale Bluetooth pairing or Windows service issue. Uninstall the “Standard Serial over Bluetooth link” entry in Device Manager, restart the “Bluetooth Support Service,” then re-pair the device. Run Windows Update if the Microsoft driver is missing.
• Port/version conflict or app can’t open COM27: Multiple SPP ports or old COM assignments can conflict. In Device Manager, remove unused Serial over Bluetooth entries, reboot, and re-pair. If the app expects COM27 but Windows assigns another port, change it in Port Settings > Advanced.