You need 2 sets of nrf24l01 and arduino(uno). Connect your nrf24l01 and arduino(uno) as in the table above. One of arduino runs send/send_simplified. The other one runs recv. The NRF24 library file is ...
A better I2C master library, originally by Wayne Truchsess. See http://dsscircuits.com/index.php/articles/66-arduino-i2c-master-library On most Arduino boards, SDA ...