USB Bluetooth adapter
1.
As shown in Figure 1 below, it is mainly used for computer to push audio to Bluetooth speaker headset through Bluetooth, or to make voice chat or call or to hold teleconference through Bluetooth speaker headset. Figure.1 As shown in Figure 2 below, it is mainly used in the teleconference system, which is equivalent to eliminating the microphone line of the traditional telephone system and making the microphone part wireless.
As shown in Figure 3 below, it is mainly used in the home living room scenario, where the TV sound is emitted to the Bluetooth speaker or headset through the Dongle. Figure 3 2、The principle diagram This case the principle diagram of the following block diagram is shown in FIG.
Figure 4
3、function declaration ： function require Support Bluetooth 5.0 protocol Bluetooth supports version 5.0 of the core protocol, as well as the Bluetooth Profile (A2DP, HFP) involved in the related voice call dongle. Supports USB Audio audio transmission The PC sends the audio output to a dongle via USB Audio channel, and then the dongle sends it to the receiving device (speaker or headset) via Bluetooth A2DP.
4、Bluetooth protocol support agreement scheme requirement BQB needs Bluetooth Core Protocol Version V5.0 support A2DP version V1.3 support A2DP SRC role support support AVRCP version V1.6 support support support V1.
6、AVRCP control If the speaker or headset has "Next", "Prev", "Play/Pause" keys and AVRCP support, you can press "Next", "Prev" keys on the speaker or headset to switch "Next, Last" to the PC player, press "Play/Pause" to pause or resume the player on the PC.
FCC Warning This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any inte rference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
