Control your Crazyflie quadcopter from your Android device. Connect to Crazyflie 2. 0 using Bluetooth low energy and both the original Crazyflie and Crazyflie 2. 0 using the USB Crazyradio dongle connected with a USB OTG cable. Features: Control Crazyflie and Crazyflie 2. 0 using Crazyradio on a USB OTG compatible device. Control Crazyflie 2. 0 using Bluetooth LE 4.