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Lego Mindstorms EV3 is the third generation robotics kit in Lego’s Mindstorms product line. It can connect up to four motors and four sensors and has a 100 x 64 pixel LED, audio output. With App Inventor’s LegoEv3 components, you can interact Lego EV3 robots easily.
Image source: Lego EV3 electrical components on Lego.com
MIT App Inventor provides complete support to interact with Lego EV3, including: