This forum is for general topics about quadcopters/multi-rotors and NOT for support topics concerning the Crazyflie or Crazyradio.
Those questions belong in their dedicated forums respectively:
Crazyflie support forum
Crazyradio support forum
If you have general questions about the Crazyflie, please post them in the Crazyflie General discussion forum.
Topics that do not belong in the Quadcopters forum will be moved!