Mobile and Embedded

@Lavanya Nobody here knows what "same as Pcomm terminal" might be, nor how it behaves, nor what you want behaviour-wise from it. @jsulm stated what to call to convert a number to a hexadecimal string.

I found a solution. You need to find all files called as "toolchain.prf" in qt instalation directory and change this code: defineTest(qtCompilerError) { !cross_compile: \ what = else: host_build: \ what = " host" else: \ what = " target" qtToolchainError("Cannot run$$what compiler '$$1'. Output:", $$2, \ "Maybe you forgot to setup the environment?") } to this code: defineTest(qtCompilerError) { # empty } After this everything works fine on ios and ios-emulator.

@koahnig I recreated it and deleted build directory, but not solved the problem.

I just solved the two problems , I am going to post what I did it may help someone: so for the first problem you have to go to the .pro file and replace the target.path with something like that (for me it is /home/pi) else: unix:!android: target.path = /home/pi/$${TARGET} after that go to project -> run and in Deployment method add a method [image: dcf1ab30-bce7-409d-8962-c667770ca742.png] and after that build and run your project and it will start working on your raspberry pi. I tested this on a Desktop version of OS to make it easier and for my lite version I just added a run environment variable QT_QPA_PLATFORM=linuxfb so now when running my application from qtcreator it actually lunches it on my raspberry using the framebuffer linuxfb. This is amazing! and now I can start a remote debug !! Thank you for helping

I had .pro.user files in my directories. Removing them and reconfiguring the project worked like a charm. Thank you very much @SGaist Problem solved.

Have Built QT 5.15.2 for the target hardware. Resources now working correctly. closing issue as it was my own fault mismatching versions.

I started over from scratch and have been successful. Unfortunately I didn't keep track of everything so I can't say for certain what caused it. I did add a swap file to deal with any issues running out of ram while compiling. And its entirely possible I had previously used the -bundled-xcb-xinput flag without starting from a new source directory. Will mark resolved.

@SGaist cross compiling opencv+qt showing error.so i decided do it manually

@swansorter said in how to RECEIVE and transmit RTP stream over udp: just i want know how to send command like ("helloworld") Have you asked your friend Google already? Like this SO question for instance...

@koahnig Thank you so much, it works now with the Qt ressources. I will post what I did maybe it will help someone! so under my test_v1 directory I createad a file image.qrc (I used nano to create it) after that in qtcreator I added to my project this file (right click on the project -> add existing files-> choose image.qrc) image.qrc containes : <!DOCTYPE RCC> <RCC version="1.0"> <qresource> <file>images/b2.png</file> </qresource> </RCC> the image b2.png is under test_v1/images

@Qt-embedded-developer said in what is way to create signal and slot on setVerticalScrollBar ?: ui->scrollArea->setVerticalScrollBar(new QScrollBar(ui->scrollArea)); There is no reason to install your own scroll bar object. Based on the settings of the scroll area it will create/show one when needed. You can get a handle to it with ui->scrollArea->verticalScrollBar(). Then use the signals of the scollbar to get informed about changes.

Thank you for responding. I shall have to try a different tack .. -- Thanks, s.

See here.

@bhanupro said in How to use Adafruite fingerprint library for RPI 4 in QT with C++: r307 fingerprint Isn't that seen as a serial port device ?

@ascoro EGLFS assumes to have exclusive access to the display (no Window Manager involved). If you want to run a Qt app in Wayland environment you need to start it with the wayland platform plugin. https://www.qt.io/blog/2018/05/29/whats-new-in-qt-5-11-for-the-wayland-platform-plugin

Don't try to load all these thumbnails.

You are missing the final sink so that it output to your application.