Raspberry Pi Stack Exchange
Raspberry Pi Stack Exchange

Questions tagged [qt]

a cross-platform application framework for developing application software

122 questions
14
votes
5 answers

PyQt5 on a Raspberry Pi

I have a Raspberry Pi 3 with Raspbian installed, along with a 7" touch screen. I'm in the process of creating an application in Python to read several DS18B20 Thermocouples to monitor the temperature of several aquariums (relays attached to heaters…
CharlieHorse
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14
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1 answer

Turning 'tvservice' on and off leaves screen blank

I'm running the Qt5 application on my raspberry pi and I would like to introduce some kind of a power-saving feature. I don't use x11 or wayland, because I don't need it, but I use gles2 (OpenGL for Embedded Systems). I want to use tvservice --off…
lewiatan
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13
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2 answers

Qt applications don't work due to libEGL

I am developing some (simple) GUI applications for the RPi2 in Qt5. The setup: The code development is performed on a Windows laptop using Netbeans + Qt Designer and remotely built on the RPi running Raspbian Jessie with tools that come with it (g++…
Andrey Pro
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8
votes
2 answers

QtMultimedia on RaspBerry Pi

I've been trying to get QtMultimedia working on Raspberry Pi for a few weeks now, cross-compiling using the BakeQtPi script, yet the QtMultimedia plugin never seems to find an appropriate service to output video through a MediaPlayer element, which…
Andreas Eriksson
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6
votes
3 answers

Which toolchain for Raspberry Pi 3 and Qt5

Which is the recommended toolchain to cross-compile Qt5.6 for Raspberry Pi 3? I tried official tools: https://github.com/raspberrypi/tools but it seems they don't support the architecture and flag required for RPi3: QMAKE_CFLAGS =…
Mark
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5
votes
2 answers

Installing Qt on Raspberry Pi 3

I'm trying to install Qt Creator to my Raspberry Pi 3 for a GUI project. However when I use the command sudo apt-get install qt5-default it gives an error saying that: E:Unable to fetch some archives,maybe run apt-get update or try with…
Avio
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5
votes
1 answer

Install Qt Framework on Raspberry pi 2 B+ on Windows 10 IoT

Qt embedded system is very useful in this topic but it is not open source, it has a price for every year and it isn't cheap. Windows 10 IoT is awesome OS, with PowerShell you can start OS with a specific application but is there any way to install…
massaimara98
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3
votes
0 answers

QML without X11

Is it possible to run QML files without X_Desktop environment in raspbian Jessie for Raspberry Pi3? I found this tutorial: EGLFS , but I would prefer if it is possible to compile directly on RPi, there is a lot of troubles with cross-compiling and…
Shiro
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3
votes
3 answers

qt5 adafruit touch screen on raspberry pi moves pointer too fast

I have finally got the adafruit 7" screen working with the X11 interface (startx) and it now seems to move the mouse accurately. However, I have a qt 5.5 app I wrote which works fine with a mouse but does not move the pointer correctly with the…
pcla
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3
votes
0 answers

Waveshare (goodix) touchscreen not working in PyQT eglfs (non-X11) application

I have a Waveshare 4" DSI round touch display, I am using Raspberry Pi OS bookworm to drive this display on a Raspberry Pi 4 Model B. I have the following line added to my /boot/firmware/config.txt …
Christi
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3
votes
1 answer

magnetic field generated by the engine alternator affects gpio value

I am working on a dashboard for a motorcycle. I created a Qt application on my raspberry pi 4 on a raspberry pi os lite. I have configured one of my GPIO as interrupt using the wiringPi library. wiringPiSetup(); pinMode(m_pin,INPUT); pullUpDnControl…
mina
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2
votes
0 answers

Qt cross compilation *QOpenGLShaderProgram: could not create shader program* error

I am using the QT Creator for my laptop (Linux LMDE 3 Cindy OS) And for Raspberry Zero Cross-compiling. I have installed the QT based of this instruction and by this setting: mkdir ~/raspi cd ~/raspi git clone…
Soheil Paper
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2
votes
1 answer

Does a binary built on pi 3 will work on pi 2?

I'm building an app on a raspberry pi 3. I'm using Qt. Will the generated binary work on raspberry pi 2? Thanks
Julien
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2
votes
1 answer

Latest Qt5 does not provide EGLFS during cross-compilation

Some time ago I set up a Linux host to cross-compile Qt5. I used this configure command: ./configure -release -opengl es2 -device linux-rasp-pi3-g++ -device-option…
Mark
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2
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1 answer

Access RPi's camera stream in OpenCV C++ (Qt)

I've setup my Raspberry pi 3 B with uv4l and have access to the video stream on http://(raspberry-IP):8080/stream address. Now, I have Qt5(C++) and OpenCV installed on my main computer. How can I access the stream frames within a Qt5 project? Or…
A. Vieira
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