plasma-nm has an option to share wifi connections via a QR code that f.i. smartphone know how to use. In one of my travels abroad the hotel only had the password in a QR code you scanned in the lobby, so I could connect my phone but not my KDE laptop with builtin camera. In the end I figured out that if I used a generic QR code scanner app for my phone I could show the password and use it on the laptop. 

Since my computer has a camera, maybe it would be useful (although, I admit, probably a little bit awkward to use) to be able to scan the same QR codes from plasma-nm. The awkwardness would be drastically reduced if scanning from a smartphone.