Based on CSR8670 4.0 dual-mode Bluetooth module, it includes A2DP (music playback), AVRCP (streaming media control and music cover transmission), HFP (hands-free calling), SPP (data transmission), PBAPC (phonebook synchronization), HID (mouse), BLE DataTrans (small data transmission in low power mode) and other protocols. VREG on the module turns on with a high level and turns off with a low level, and automatically connects to the most recently connected mobile phone after turning on. The Bluetooth module performs UART communication with the MCU, and uses AT commands to achieve functions such as connection, disconnection, making calls, music playback and remote control, downloading phonebooks, and data transmission. Because the solution adopts 4.0 dual mode, it does not require MFI certification and is compatible with data communication serial port configurations of Android, Apple, and Microsoft platforms: Baud rate: 115200 Data bits: 8 Stop bits: 1 No check and no flow control.
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