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Platform: LEGO® MINDSTORMS® EV3 robot platform

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 of the Arduino/Genuino 101 board. Source: Lego.com
Image source: Lego EV3 electrical components on Lego.com

MIT App Inventor provides complete support to interact with Lego EV3, including:

Ev3Motors — control motor speed and direction.
Ev3ColorSensor — detect light intensity and color code.
Ev3GyroSensor — detect angular velocity.
Ev3TouchSensor — detect whether this sensor is pressed/released.
Ev3UltrasonicSensor — detect distance between object ahead.
Ev3UI — diplay text/number/image on Ev3's 100x64 pixel monochrome LED.
Ev3Sound — play music or short sound effects on Ev3 brick.
Ev3Commands — low level commands can talk to Ev3 brick directly.

Please follow our tutorials to get start:

Button Control — Control Lego EV3 robot with buttons. You can also adjust the motor speed by sliders.
Sensor panel — View Lego EV3 sensor status on app screen: touch, ultrasonic and color sensors.
One Touch Control — Control Lego EV3 robot with one finger.