Lego Sherlock Holmes figure focuses a light beam on a Lego criminal with a small magnifying glass.

The LEGO Arduino Cookbook Chapter 12: Connecting MINDSTORMS to a Smartphone

Chapter 12 of The LEGO Arduino Cookbook combines a smartphone with MINDSTORMS EV3. Two example projects are built in this chapter, including the Tilt Mimic and the Intrusion Monitor, shown in the videos below.