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QT Bluetooth communication via RFCOMM to Raspberry PI 3

  • I am trying to communicate with my mobile app to my raspberry pi 3 and I am using QT to build an app.

    I used for the first steps the example project "Bluetooth Chat Example", which is using a RFCOMM-server to communicate with my Raspberry.

    The Raspberry has a bluetooth function and I started the RFCOMM server.

    Unfortunately my phone is not recognizing my Raspberry Pi.

    Other apps like: Serial Bluetooth terminal are working fine and the communiction is working.

    QT-Version: Qt 5.15.0

    Does anyone know how to fix this ? I mean why is my app not seeing my raspberry or the other way around.

    If you need further information, just let me know

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