The application freezes during serial connection

[serkan_tr]

Hello, I am working on a project where I am using ROS2 Humble and Qt 6.8. In the interface I developed, I wrote a code that scans USB ports and ensures connection only with specific devices. This code periodically scans the devices connected to the ports and automatically closes and reopens the port if a device is disconnected and reconnected. Additionally, I added an auto-connect option to the interface. However, I noticed that when switching to the settings tab, the screen freezes until the connection is established. How can I resolve this issue?

Detail:
this code
This is the section where the serial port automatically connects and general settings are configured.
This is the QML page where the settings are located.

this video

Even though I press the settings section, it opens very slowly.

[SGaist]

Hi,

Why are you sleeping the thread in that class ?

[serkan_tr]

@SGaist To ensure it waits a bit during connection, but if this stops the system, I need to add another wait in that section

[jsulm]

@serkan_tr said in The application freezes during serial connection:

To ensure it waits

Why do you need to wait? Qt is assynchronous, there is usually no need to wait for anything.

[serkan_tr]

@jsulm After the Arduino is connected, when a command is sent immediately, it leaves itself in boot mode. Therefore, a short delay is needed

[jsulm]

@serkan_tr Then use QTimer with a timeout where you send the command.

[serkan_tr]

@jsulm Thank you