How to configure MOD-RTL8188 in the official OLinuXino Debian releases
Check the Ethernet and WLAN interfaces by typing:
and look at your number of the wlan. For instance, in this example, we have 'wlan3'. Open the file /etc/network/interfaces - for example, by using nano text editor:
# nano /etc/network/interfaces
It would have a section for wlan3 that looks like shown below:
# auto wlan3
iface wlan3 inet dhcp
Edit the wpa-ssid and wpa-psk with the values of your network.
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.