利用nrf2401进行无线传输，其有效距离可以达到20米的传输，可以通过在 发射端及接收端设置不同地址，通过传输地址及接收地址进行两点间的数据传输。(By using nRF2401 for wireless transmission, its effective distance can reach 20 meters. It can transmit data between two points by sending different addresses at the transmitter and receiver terminals.)