addrType就是从机广播的地址类型
/** @defgroup GAP_ADDR_TYPE_DEFINES GAP Address Types
* @{
*/
#define ADDRTYPE_PUBLIC 0x00 //!< Use the BD_ADDR
#define ADDRTYPE_STATIC 0x01 //!< Static address
#define ADDRTYPE_PRIVATE_NONRESOLVE 0x02 //!< Generate Non-Resolvable Private Address
#define ADDRTYPE_PRIVATE_RESOLVE 0x03 //!< Generate Resolvable Private Address
/** @} End GAP_ADDR_TYPE_DEFINES */