We can’t find anyone else in our archive who’s made a Bluetooth dongle in this way, but we’ve certainly seen sniffing of HCI commands to reverse engineer a speaker’s communications.
A USB-based adapter for Ethernet, Bluetooth or some other wireless technology. Functioning as the base station's transmitter/receiver (transceiver), the USB plug is attached to the unit ...
The dongle uses 2.4GHz and a codec based on LC3. The PrismXR Vega T1 VR wireless earbuds can work over Bluetooth or with the proprietary RF dongle ... [+] that provides low latency with support ...