Solving the Jieli BR21 Driver Mystery: More Than Just a Dongle
If you’ve recently plugged in a "Jieli BR21" and were confused to see a new storage drive or a generic audio device instead of a Bluetooth settings menu, you aren't alone. Despite its appearance as a standard Bluetooth dongle, the Jieli BR21 often identifies itself as a USB Composite Device or USB Sound Card rather than a typical wireless adapter.
This guide breaks down why this happens and how to get your driver working. 1. Why Your PC Sees a "Storage Device"
The Jieli BR21 chip is frequently used in inexpensive USB music transmitters and audio mixers. A common quirk is that it uses SCSI via USB Mass Storage to handle proprietary vendor commands.
The Symptom: You plug it in, and a "Removable Disk" or "BR21 UDISK" appears in File Explorer.
The Fix: You usually don't need a specific storage driver. If it's interfering with your system, you can simply disable the disk drive entry for "BR21 UDISK" in the Windows Device Manager. 2. Setting Up the Audio Driver
In many cases, the BR21 isn't meant to add Bluetooth capabilities to your PC (like a mouse/keyboard dongle). Instead, it acts as a bridge to send PC audio to Bluetooth headphones or receive audio from a phone.
Plug & Play: Windows 10 and 11 typically recognize it as a generic "Audio Device" or "Borofone BR21 Stereo" without needing extra software.
Selection: Go to your Sound Settings and ensure "JieLi BR17" or "JieLi BR21" is selected as your default Output and Input device.
Troubleshooting Hardware: If you are using a mixer, look for a physical "ST/USB" or "PC" button on the hardware that must be pressed to activate the USB interface. 3. For Developers: Firmware and SDKs
If you are trying to program or modify the chip (e.g., changing the pairing name), you won't find a "consumer" driver on a standard website.
SDK Access: Technical users often source the AC69 SDK from specialized repositories like the Jieli-Tech GitLab.
Tools: Look for isd_download.exe or bt_config_tools within these packages to interface with the chip at a hardware level. Quick Pairing Guide If your BR21 is a transmitter (like the PC-T7 model): Plug the dongle into a USB port. Wait for the blue LED to flash, indicating pairing mode. Put your Bluetooth headphones/speakers into pairing mode. Jieli Br21 Driver
The devices should pair automatically without a software interface on your PC. christian-kramer/JieLi-AC690X-Familiarization - GitHub
The Jieli BR21 is a Bluetooth chip frequently found in affordable Bluetooth dongles, speakers, and audio receivers. Because these devices are designed to be "Plug and Play," they usually rely on standard Windows or Linux drivers rather than proprietary software. 1. Windows Installation (Plug & Play)
For most users on Windows 10 or 11, the "driver" is built into the operating system.
: Plug the device into a USB port. Windows should automatically recognize it as "Speakers (JieLi Br21)" "Mp3-Audio Spker" Verification Device Manager
under "Sound, video and game controllers." If you see a yellow exclamation mark, right-click it and select "Update driver" > "Search automatically for drivers." Manual Driver Utility
: If the device isn't recognized, some generic driver scan tools like DriverIdentifier provide listings for compatible BR21 stereo drivers. Studiomaster Professional 2. Pairing Guide
If the driver is installed but you cannot hear audio, the device may not be paired correctly. Pairing Mode
: When plugged in, a blue LED usually flashes rapidly on the dongle or speaker. Connecting Turn on Bluetooth on your smartphone or PC. Search for new devices. "JieLi Br21" from the list. : The BR21 is often a receiver-only
chip, meaning it receives audio from your phone to play through a speaker, rather than acting as a transmitter for Bluetooth headphones. Ask Ubuntu 3. Firmware & Developer Tools
For developers or those trying to unbrick a device, Jieli uses specific update tools. Update Tool Jieli USB Dongle 4.0 Update Tool is used to flash or upgrade the BR21 firmware. DIP Switch Settings
: If using a professional Jieli programmer, the lower four bits of the DIP switch should typically be "Not switched" to send the USB key and upgrade the BR21.
: Official software development kits (SDKs) for related AC63 and AC69 series chips can be found on the Jieli-Tech GitHub 4. Common Troubleshooting Shown as Storage Solving the Jieli BR21 Driver Mystery: More Than
: Sometimes the BR21 appears as a mass storage device (like a thumb drive) instead of an audio device. This usually requires waiting 10–30 seconds for the OS to switch the device mode.
: Ensure the default playback device in your sound settings is set to "JieLi Br21". Ask Ubuntu Further Exploration Check out the JieLi-AC690X Familiarization
on GitHub for a technical deep dive into interacting with Jieli chips via command line. Refer to the Studiomaster Professional Manual
for specific examples of how the BR21 is integrated into DJ equipment. Review the Jieli USB Dongle Manual
for detailed hardware switch configurations and LED status indicators used during firmware updates. Are you trying to connect the to a specific device like a car stereo , or are you looking for firmware development Jieli USB Dongle 4.0 Update Tool Manual
(1) DIP switch lower four bits: Not switched: Send USBkey, upgrade DV15, DV16, DV17, BR17, BR18, BR20, BR21, BR22 (non-A version). ru.yufanchip.com Jieli BR21 Bluetooth dongle shown as storage device
The Jieli BR21 is a Bluetooth audio chip often found in USB audio transmitters, dongles, and soundboards. In most cases, these devices are designed to be "plug-and-play," meaning they use standard USB audio class drivers already built into Windows and Linux. Troubleshooting Jieli BR21 Issues
If your device is not working or is being recognized as a storage device instead of an audio one, consider the following steps:
Wait for Recognition: On some systems, the Jieli BR21 can take a few moments to be fully identified after being plugged in.
Check Input/Output Settings: Ensure the device is selected as your primary audio playback or recording device in your system's sound preferences.
Fix Volume Glitches: If the device keeps trying to change your system volume automatically, you can try disabling the "USB Input Device" associated with it under Human Interface Devices in the Windows Device Manager.
Driver Identification: While there is no official standalone "Jieli BR21" driver download for most consumers, it often relies on generic drivers like those found on DriverIdentifier for specific products like the Borofone BR21. For Developers and Advanced Users Safe Download Steps:
If you are working with the raw chip (like the AC69 series) or a Jieli update tool:
Update Tools: The Jieli USB Dongle 4.0 tool is used to upgrade chips in the BR17, BR20, and BR21 series.
Software SDKs: Developers often use the "AC69 SDK" or "bt_config_tools" to program and interface with these chips.
Are you trying to fix a connection issue with a specific device, or are you looking for programming resources for the chip? Jieli BR21 Bluetooth dongle shown as storage device
I can confirm this works with Ubuntu 22.04. Using at terminal lsusb lists as: "ID 4c4a:4155 Jieli Technology USB Composite Device" Ask Ubuntu Jieli BR21 Bluetooth dongle shown as storage device
.inf and .sys files.Alternative name to search: Jieli USB Audio Driver V2.0 or BR21 Bluetooth Dongle Driver.
The Jieli BR21 is an integrated circuit (IC) designed by Jieli Technology. It is a Bluetooth audio chip that handles the transmission of sound, battery management, and button controls. It is widely used because it is cost-effective and offers solid performance for the price.
Do you need a specific driver? Technically, no. The Jieli BR21 is designed to be "plug-and-play." It adheres to standard Bluetooth protocols (A2DP/HFP). Modern operating systems (Windows 10/11, macOS, Android, iOS) have generic drivers built-in that should automatically recognize the chip.
One reason to install the driver is to update the firmware of your BR21 device. This can add codecs like aptX or fix pairing bugs.
Tools needed:
.bin or .hex format) – request from the manufacturer.Process (general):
Warning: A failed flash can brick your device. Only proceed if you have a recovery image.
Cause: USB selective suspend. Fix: