Skip to content Skip to sidebar Skip to footer
Home / Oppo / ugreen bluetooth 50 usb adapter cm390 driver install

Ugreen Bluetooth 50 Usb Adapter Cm390 Driver Install Site

To install the driver for your UGREEN Bluetooth 5.0 USB Adapter (Model: CM390)

, follow these steps to ensure a stable connection on Windows systems. 1. Pre-Installation (Crucial Step) Before plugging in the adapter, you must disable your computer's built-in Bluetooth (if it has one) to avoid driver conflicts. Device Manager on your PC.

Find "Bluetooth" in the list, right-click your internal Bluetooth adapter, and select Disable device device.report 2. Driver Installation Methods

You can install the driver using the physical media included with the product or by downloading it from the official site. Question about Ugreen CM390 - Galaxus

The UGREEN Bluetooth 5.0 USB Adapter (Model: CM390 / 80889) is an ultra-compact dongle designed to add high-speed wireless connectivity to Windows-based PCs and laptops . Key Features

Bluetooth 5.0 + EDR: Provides faster data transmission, higher stability, and lower power consumption compared to older versions .

Multi-Device Connectivity: Supports simultaneous connection for up to 5 devices, such as headsets, mice, keyboards, game controllers, and printers .

Extended Range: Offers a reliable transmission distance of up to 20–30 meters (approx. 66–100 feet) in open spaces without obstructions .

Status Indicator: Features a built-in LED that flashes during pairing and remains solid once a connection is successfully established .

System Compatibility: Primarily designed for Windows 11, 10, 8.1, and 7; it is not compatible with macOS or iOS devices . Driver Installation Guide ugreen bluetooth 50 usb adapter cm390 driver install

While the adapter is often plug-and-play for modern Windows systems, manual installation is recommended for full functionality on older versions or if automatic setup fails . UGREEN CM390 Bluetooth Adapter User Guide - device.report

0 USB Adapter (CM390) driver on your system. Driver Installation for UGREEN Bluetooth 5.0 (CM390)

The UGREEN CM390 adapter typically uses the Realtek RTL8761B chipset. While Windows 10 and 11 often attempt to install a generic driver automatically, the official driver is required to unlock the full Bluetooth 5.0 features and ensure stable connectivity. 1. Download the Official Driver Visit the official UGREEN Download Center. Search for model number CM390 or "Bluetooth 5.0 Adapter."

Download the driver package specifically for Windows (usually supports Windows 7, 8.1, 10, and 11). 2. Pre-Installation Steps

Disable Built-in Bluetooth: If your laptop or desktop already has an internal Bluetooth chip, you must disable it first. Go to Device Manager > Bluetooth, right-click the internal adapter (e.g., Intel Wireless Bluetooth), and select Disable device.

Remove Old Adapters: Unplug any previous Bluetooth dongles before starting the setup. 3. Installation Process

Extract the Files: The driver usually downloads as a .zip file. Right-click and extract all files to a folder.

Run Setup: Locate the setup.exe file within the extracted folder.

Follow the Wizard: Double-click the installer and follow the on-screen prompts. To install the driver for your UGREEN Bluetooth 5

Insert the Adapter: When prompted by the installer (or after the installation completes), plug the UGREEN CM390 into a USB 2.0 or 3.0 port.

Restart: Once the installation finishes, restart your computer to finalize the driver integration. 4. Verifying the Installation To confirm the adapter is working correctly: Open Device Manager. Look under the Bluetooth section.

You should see "Realtek Bluetooth 5.0 Adapter" listed without any yellow warning icons. Troubleshooting Tips

USB Port: If the device isn't recognized, try a different USB port, preferably one directly on the motherboard (back of the PC) rather than a front panel or hub.

Driver Error: If you see a "Driver Error" message in Windows Settings, uninstall the device from Device Manager, unplug it, and run the setup.exe again as an Administrator.

"Code 10" or "Device cannot start"

  • Fix: Go to Device Manager > View > Show hidden devices. Uninstall every greyed-out Bluetooth device. Then unplug the CM390, reboot, and plug it back in.

2. Hardware Architecture and Chipset Analysis

To understand the driver requirements, one must first identify the underlying silicon. While branded as UGREEN, the CM390 utilizes a reference design based on the Realtek RTL8761B chipset.

  • Interface: USB 2.0 / 3.0 backward compatible.
  • Bluetooth Specification: Bluetooth 5.0 (BLE).
  • Chipset Driver Requirement: Realtek USB Bluetooth Driver.

The OS identifies the device via its Vendor ID (VID) and Product ID (PID). For the CM390, these identifiers typically map to Realtek generic identifiers (e.g., VID_0BDA&PID_8771). The complexity of installation often arises when the operating system attempts to match these IDs against its generic driver library, frequently resulting in a "Bluetooth Dongle" error or limited functionality.

3.2 Linux Environment (Ubuntu/Debian)

Linux integration relies on kernel modules and firmware blobs.

Kernel Support: The RTL8761B chipset is supported in modern kernels (5.x+). The driver module is typically btusb. Fix: Go to Device Manager > View >

Firmware Installation: If the device is recognized but fails to pair, it usually indicates missing firmware binaries.

  1. Identify the firmware file requirement via dmesg (e.g., rtl_bt/rtl8761b_fw.bin).
  2. Locate the firmware source (often provided by UGREEN or available in the linux-firmware package).
  3. Copy the .bin files to /lib/firmware/rtl_bt/.
  4. Reload the kernel module: 
    sudo modprobe -r btusb
sudo modprobe btusb

Step 2: Download the Driver (Windows 10 Users)

If Windows does not automatically install the driver, you have two options:

  1. Official UGREEN Website:
    • Go to the UGREEN official support page.
    • Search for "CM390".
    • Download the driver file (usually a ZIP file).
  2. Direct Realtek Driver (Alternative):
    • The CM390 uses the Realtek RTL8761B chipset. If the UGREEN website is slow or down, you can search for the "Realtek RTL8761B Bluetooth USB Driver" online. (Note: Always scan downloaded files with antivirus software if downloading from third-party repository sites).

How to Install the UGREEN Bluetooth 5.0 USB Adapter (CM390) Driver

Struggling to get your new UGREEN Bluetooth dongle to work? You are not alone.

The UGREEN Bluetooth 5.0 USB Adapter (Model CM390) is one of the most popular dongles on the market because it’s cheap, tiny, and generally reliable. However, there is a massive point of confusion for new users: The driver installation.

If you just plugged it in and nothing happened (or you see "Unknown USB Device"), this guide is for you.

Problem 1: "The Device Cannot Start (Code 10)"

Cause: Windows loaded a generic Microsoft driver instead of the Realtek driver. The generic driver recognizes the USB device but cannot turn on the Bluetooth radio.

Fix:

  1. Device Manager > Right-click the CM390 > Uninstall device.
  2. Check the box "Delete the driver software for this device."
  3. Unplug the adapter.
  4. Restart PC.
  5. After reboot, plug the adapter back in slowly. (Yes, slowly—some USB controllers negotiate better with a gradual insertion).

Registry Fix for Bluetooth Radio Instability (Windows 10 only)

Warning: Back up your registry before proceeding.

  1. Windows + R > regedit
  2. Navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\USB\
  3. Search for VID_0BDA&PID_8771 (The CM390’s hardware ID).
  4. Expand the folder, click on Device Parameters.
  5. Find EnhancedPowerManagementEnabled. Double-click it and change the value from 1 to 0.
  6. Find SelectiveSuspendEnabled. Change from 1 to 0.
  7. Restart.