HS-USB AT Port (COM4) Driver

The HS-USB AT Port (COM4) driver helps Windows recognize the Azurewave-associated USB AT-command interface and allows compatible software to communicate with it through a serial port. You may need this driver if you are setting up the device for the first time, reinstalling Windows, or troubleshooting an unrecognized port in Device Manager. This interface is typically used for modem control and diagnostics rather than general USB file transfers.

Key Features

• AT-command communication: Enables compatible modem or diagnostic software to send commands through the device’s USB serial interface.
• Device recognition: Helps Windows identify the AT port instead of leaving it listed as an unknown device or showing a missing-driver warning.
• Serial port access: Makes the interface available to applications that require a COM port. Although the device name includes COM4, Windows may assign a different number.
• Legacy Windows support: Driver packages for this device may support Windows 10, 8.1, 7, Vista, and XP; check the individual package’s compatibility before installation.

How to Install HS-USB AT Port (COM4) Driver

1. Identify your device and Windows version. Open Device Manager, locate the AT port or unknown USB device, and check its hardware IDs under Properties > Details. Confirm whether your Windows installation is 32-bit or 64-bit.
2. Choose a matching package. Before starting your HS-USB AT Port (COM4) driver download for Windows, verify that the package matches those hardware IDs and your operating system. Select the latest version compatible with your hardware, not simply the newest available release. If comparing Windows 10/11 options, note that Windows 11 support is not established by the supported OS list above.
3. Download and extract the files. Use a trusted manufacturer or device-support source. If a free download is offered, avoid third-party installers that bundle unrelated software.
4. Install the driver. Run the supplied setup program, or use Device Manager’s driver update option to browse to the extracted driver folder. Follow the prompts and restart Windows if requested.
5. Verify the connection. Check that the device appears without a warning icon, typically under Ports (COM & LPT). Configure your application to use the COM number Windows actually assigned.

Keep the driver updated when a compatible release addresses connection problems or improves reliability. Before you update a working installation, review compatibility details and retain the previous package in case you need to roll back.