Cubieboard

If you have your cubieboard stable and do not like the led to blink, you can turn it off.

I wanted to connect my cubieboard with lubuntu to my arduino via serial communication. For that I had to enable a UART and connect pins to my arduino (only RX/TX is needed). I have arduino mini 3.3V on which I have attached some sensors (outside temperature).
By this command you can check if the port is enabled:

stty -F /dev/ttyS0 -a

In fresh installation of lubuntu the ttyS0 is configured and used by kernel and ttyS1 is not enabled. You will get this message for ttyS1:

Cubieboard has thickness 2.00mm 2×20-pin-header that is not so suitable for home hobbiest.
Arduino and other small boards uses 2.54mm pin (0.100inch)