In this chapter, you have learned some of the UDOO characteristics related to available input and output pins, and how both processors are connected together via the internal serial bus. Moreover, in the first part, we wrote and deployed our first sketch into the board.

Then, we delved the communication mechanism realized through the ADK and wrote a new Arduino sketch capable of establishing a communication with Android using the internal OTG port. Doing the same for Android, we created a simple user interface to provide a visual feedback during the device usage. We also wrote in our Android application some wrappers to easily expose commonly used ADK methods to open and close the connection, and to write into the communication channel.

At the end of the chapter, you learned how to use a breadboard to fast prototype a circuit and you built your first one using an LED and a resistor. Then, we added all the required code to send the turn on and off signal from our Android application...