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Bluetooth mode without connecting on Android

I am using Android 4.x and want to send some data without establishing a connection. I tried the Android API (BluetoothSocket), but you can only send data if the device is connected. Is it possible to send data without establishing a connection? This should be possible since BluetoothV3.0. Thanks.

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Source: https://habr.com/ru/post/1496735/

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