本工程实现了低功耗蓝牙4.0协议中的peripheral（从机）和oberser（扫描）双模式的结合。同时可以利用蓝牙广播建立起简单地组网功能。(This project implements the combination of peripheral (slave) and oberser (scan) dual mode in Low Power Bluetooth 4 protocol. At the same time, Bluetooth broadcasting can be use