This page provides access to a QR code for any open or WPA2-PSK secured SSID. The QR code can be scanned by current smartphones (an additional app may be required) and sets up the respective WLAN automatically on the smartphone. This spares users the laborious entry of a wireless key.
It is also possible to print out individual QR codes separately.
Important: QR codes cannot be used for networks secured by 802.1X as they do not use a static WLAN key (PSK).