If you, as me, have a very long password for your wlan, it’s tiresome
to give out the password to random guests who need to connect.
in your ssid, password and type of encryption and you get a QR-code to
print and give to guests. All your guest need to do, is scan the QR
code with f.ex barcode scanner on Android (or similar on other
phones), and they will connect automatically! http://zxing.appspot.com/generator/ Clever!