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使用App Inventor 2 控制物联网设备/低功耗蓝牙设备(BLE) · App Inventor 2 中文网
...征为其赋予数据值，以便在与服务器交换数据时可以进行读写。
图 3：BLE GATT 通信协议。 摘自[8]。
二. 之前的工作
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