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现在想做一个实时监测电量功能，这部分例程里只在batt_profile里提及了service,没有看到实际底层咋读取电量。请问底层读取电量这部分需要自己写吗？
优酷上面的“如何基于FR8016HA建立一个多主多从的蓝牙通信工程”，这个多连接演示工程在哪里可以下载