How to configure MOD-RTL8188 on most of the official OLinuXino Debian releases:
type 'ifconfig -a'
and look at your number of the wlan. For instance, we have wlan3
open the file /etc/network/interfaces- for example using nano text editor
and edit the wpa-ssid and wpa-psk with the values of your network
iface wlan3 inet dhcp
After you are done press 'shift' + 'o' to save. Then press 'shift' + 'x' to exit the nano editor.
To enable the interface.
If the interface doesn't yet start, reboot the board.