Hi,
I have recently updated my Arduino NRF24 library to include example sketches that work with Crazyflie clients and copters using an NRF24 transceiver such as the sparkfun WRL-00691 http://www.sparkfun.com/products/691
http://www.airspayce.com/mikem/arduino/NRF24
The 2 examples included are:
crazyflie.ino
This sketch act like a Crazyflie quadcopter http://www.bitcraze.se/
using the CRTP radiolink protocol:
crazyflie_client.ino
This sketch act like a Crazyflie client (ie the transmitter) using the CRTP radiolink protocol:
to control a Crazyflie quadcopter http://www.bitcraze.se/
using a RC transmitter in trainer mode, such as the Spektrum DX6i and others.