Put your target Bluetooth peripheral (such as headphones) into pairing mode. The JieLi BR21 firmware handles the handshake automatically at the hardware level without needing a heavy software UI like BlueZ. 5. Verification and Results

If the device stays as "BR21 UBOOT," it may be stuck in bootloader mode.

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

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Jieli Br21 Driver Verified Info

Put your target Bluetooth peripheral (such as headphones) into pairing mode. The JieLi BR21 firmware handles the handshake automatically at the hardware level without needing a heavy software UI like BlueZ. 5. Verification and Results

If the device stays as "BR21 UBOOT," it may be stuck in bootloader mode. jieli br21 driver verified

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 Put your target Bluetooth peripheral (such as headphones)