NRF24l01

代码说明：

  系统平时处于循环接收检测状态，当有按键动作后发送数据 ，对方收到数据后LED闪烁， 任何一方可以发数据也可以收数据。 1． 当检测到按键动作后发送数据，自身LED闪烁 2． 当收到数据后LED闪烁 (Usually in the loop receiver detect state data, send keystrokes LED flashes after receipt of this data, either party can send data can also receive data. 1. When sending data detected keystrokes own LED flashes. LED flashes when data is received)