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一、蓝牙协议 蓝牙体系结构中的协议模型可分为以下5层。（1）物理层:蓝牙协议的无线接口层,其射频系统是跳频系统;（2）核心协议:基带协议（Baseband）、链路管理协议（LMP）、逻辑链路控制和适配协议（L2CAP）、服务发现协议（SDP）等;（3）射频通信协议:RFCOMM;（4）电话传送控制协议:TCS二进制协议、AT命令集等;（5）应用协议（可选协议）:PPP、UDP/TCP/IP、OBEX、vCard/vCarl、FAX、PAN等。
First, the Bluetooth protocol Bluetooth architecture protocol model can be divided into the following five layers. (1) The physical layer: The wireless interface layer of the bluetooth protocol, the radio frequency system thereof is the frequency hopping system; (2) The core protocols: Baseband, Link Management Protocol (LMP), Logical Link Control and Adaptation Protocol L2CAP), service discovery protocol (SDP), etc .; (3) RF communication protocol: RFCOMM; (4) Telephone transmission control protocol: TCS binary protocol, AT command set; UDP / TCP / IP, OBEX, vCard / vCarl, FAX, PAN and so on.