EXAMPLE ARDUINO SKETCHES:
Example: Transmit the position of a Joystick X and Y with one nRF24L01 to another nRF24L01 that will receive and display the Joystick position.
There are two sketches that you can cut and paste into a blank Arduino IDE windows and then save. Upload one to the Arduino that has an nRF24L01 connected, and the joystick or Potentiometers connected. Upload the other into an Arduino with an nRf24L01.