In this tutorial we show you how to connect a LED to the Wandboard GPIO and how you can easily control it.
For this you will need to connect a LED by cable to connector JP4.
Connect one wire to JP4 pin 4
Connect the GND return pin from the LED to JP4 pin 19
After this is done go to the Wandboard download center, Download the Ubuntu demo image and create a bootable SD card
On your Wandboard open the built in terminal
To turn the LED on type :
# cd /sys/class/gpio/gpio75
# sudo Su
# echo out > direction
# echo 1 > value
To turn the LED off type :
# echo 0 > value
To let the LED flash with 1 second intervals type :
# while [ 1 ]; do echo 1 > value; sleep 1; echo 0 > value ; sleep 1;done
And there you go. your “do-it-yourself” Christmas lighting system.