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