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【解决】Error 515: Not connected to a Bluetooth device. - 创客硬件开发...
Error 515: Not connected to a Bluetooth device.
原因：经典蓝牙设备未正常连接上，就进行数据收发操作导致的异常，加一个连接状态判断就行。
- App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
...个 UUID 来标识事物时几乎不可能产生碰撞。如果您知道要连接的服务/特性，那么将它们编码到应用程序中是有意义的。如果您正在开发一个更通用的 UI，以便人们探索 BLE 建议中可用的服务，那么您可能需要查看 DeviceCharacteristic...
app 息屏后连接会断开，需要深入研究一下 - 用户反馈 - 清泛IT社区，为创新赋能！
如题，tcp，蓝牙，mqtt 等连接都会断开。
有办法避免吗？
重连策略有效解决吗？
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