This application note describes the low-level Frequency Agility Protocol for nRF24XX. This

　　is a protocol that gives protection against disturbing traffic from frequency stationary systems

　　like WLAN and frequency hopping devices like Bluetooth.

　　The protocol is generic and can be used in many different systems that require resistance

　　against disturbance from other systems. By using this protocol， a system can operate in close

　　proximity with systems using different WLAN channels， 2，4GHz cordless phones， 2，4GHz

　　remote controls， microwave ovens， Bluetooth devices and other proprietary 2，4GHz systems.

　　Basing its functionality on recovery by retransmission of lost packets， it will be much more

　　reliable than a uni-directional communication protocol.

　　This document describes the assumptions that the protocol is based on， a description of the

　　functionality， implementation described with state machine diagrams， current consumption

　　calculations and C-code examples.