Can I use QtSerialPort to detect if a serial device is connected/disconnected?

[Kammersgaard]

Hey!
I'm writing code for a button that communicates through a serial port. I have used QtSerialPort which have been great. Now I want to see if I can make my program automatically detect if my device is connected/disconnected? I hope to use QtSerialPort but otherwise I open to other solutions.
Thanks!

[MrShahi]

I don't think so Qt provide support for device interaction. To interact with device use OS native api.

[kuzulis]

For the serial port in general not possible to determine whether connected to it a device.

Only if the device is special and uses additional lines such as RTS, DTR and so forth, that is, puts these lines in "High",
then we can define the connected device by reading the state of these lines dtr(), rts().

Also, you can determine whether the device is connected - to periodically send requests to it, and if it does not respond - it is not connected.