I have these versions . It does not work when i build directly on raspberry pi .

@iman4k I don't know, I'm not a cross compile expert by any means. I'm just telling you want I can see from the configure you posted. Anyway, should be easy enough to add according to this https://doc.qt.io/qt-5/qtvirtualkeyboard-build.html you can simply open the qtvirtualkeyboard source project with QtCreator and compile it, using your cross compile kit

@bublee_jessie And what is the problem? On the server side check the client IP which is trying to connect and only accept connection if correct IP and not connected yet.

@aha_1980 ok, i understood what you said.

@vishbynature said in Qt Program start on bootup and start GUI interaction automatically: As soon as MainWindow GUI appears I should start SPI data transfer. Sure. You can use QTimer to trigger the transfer.

@dheerendra That is the content found in an archive dowload from November 2017. I have just checked the qmake.conf is from 2. October 2017 Therefore no changes from my side.