AR.Drone Controlling System Based on 3D Magnetic Sensor - DFRobot
Attaching a Raspberry Pi camera to a drone
Amazon.com : TFmini-s Lidar Sensor 0.1-12m Measurement Range Distance Single-Point Ranging Finder Module UART / I2C Compatible with Pixhawk,Ar duino and Raspberry Pi for Drone/Robot Obstacle Avoidance : Electronics