In this chapter, we learned how EV3's extremely hackable nature has led to the proliferation of alternate frameworks that allow EV3 to be programmed using traditional programming languages. One of these alternatives is LeJOS, a powerful framework based on the Java programming language.

We studied the fundamentals of LeJOS and learned its advantages over other frameworks. Convinced of its efficacy, we proceeded to install it on EV3 using an SD card, a remarkably straightforward process. We ended the chapter by testing the installation using one of the sample programs shipped with the LeJOS firmware.

In the next chapter, we will learn how to communicate with and control an EV3 running LeJOS.