Qt+QML application on remote machine

Damian7546

Hi,

On my working station with windows 10 I have qt creator. On this machine I would like to write app Qt+QML which one will be running on remote machine with Debian system. It is possible indicate the remote machine in qt creator and write and run app on them from workstation ?

I would be really grateful for any tips or tutorials which one explain how do this.

Regards

Damian7546

So I prepared remote fresh computer with Debian OS in network 192.168.1.17, enabled SSH on port 22222.
So In my local machine in qt creator I try connect by SSH and looks like the connection is established but lack of some packages on my remote machine.

What I should install on my remote machine to achive my functionality ?

Whats more, when I choosen KIT created by me: RemoteLinux
and I tried run my app, the files are send to remote machine but with .exe app.

19:20:56: The process "C:\Qt\Tools\mingw810_64\bin\mingw32-make.exe" exited normally.
19:20:56: Trying to kill "ModbusExample/bin/ModbusExample.exe" on remote device...
19:21:04: Remote application killed.
19:21:04: Deploy step finished.
19:21:04: 1 file(s) need to be uploaded.
19:21:10: sftp> -mkdir ''
sftp> -mkdir .
sftp> -mkdir ..
sftp> -mkdir ModbusExample
sftp> -mkdir ModbusExample/bin
sftp> put C:/Users/LENOVO/Documents/qt_proj/modbus_example/build-ModbusExample-RemoteLinuxT1in-Debug/debug/ModbusExample.exe ModbusExample/bin/ModbusExample.exe

19:21:20: All files successfully deployed.
19:21:20: Deploy step finished.
19:21:20: Elapsed time: 00:34.

What should have to change in my local machine to generate project to Linux Debian ?

SGaist

Hi,

The first thing you need is a cross-compiled Qt. You are building an executable that can only run on Windows.

Damian7546

@SGaist
how to do it?

SGaist

The technique is similar to the one for RPi.

Something you can try is QtCrossTool. Note that I have not used it.

Damian7546

@SGaist
I took a shortcut and use two Debians. from my develop Debian I connect to remote Debian by SSH. the executable file is send to remote Debian but smoething is wrong.
When I run my app on remote linux I get respond:

11:05:13: Starting ModbusExample/bin/ModbusExample ...
qt.qpa.xcb: could not connect to display 
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, xcb.

11:05:13: Remote process crashed.

SGaist

Are you forwarding your X server connection ?

Damian7546

@SGaist said in Qt+QML application on remote machine:

Are you forwarding your X server connection ?

I don't know what we're talking about ? Can you exaplain me ?

My Kits to remote linux device is cofigured like below:

Maybe problem is in Build device ?

SGaist

What are the device settings ?
By the way, are you using Xorg or Wayland on your target machine ?

Damian7546

@SGaist I do not know. I only know that remote machine is with Debian 11 OS with Xfce desktop environment

SGaist

Then, if you don't already have, create a ssh configuration file that sets the parameters connection for your remote machine. Test it by connecting from your terminal and start a GUI app like the one you are developing. Once you have that working, retry with Qt Creator.