In this chapter we concentrated on understanding the basics of writing a sketch; loading and executing the sketch in the Arduino board. We also learnt the most commonly used in-built C functions, followed by a detailed understanding to sending and receiving digital and analog signals. So far our journey was focused on the basics and the sketch that we studied was contained within the Arduino Uno board.
In the next chapter we are going to get introduced to building breadboard circuits with external hardware components and then learn how to interface them with the Arduino board. We will also take an in-depth look at various common electronic components used for Arduino prototyping. It is important to grasp the basic concepts as these will go a long way and make you fully self-reliant in your future endeavors.