四个从机检测温湿度和光照度，通过nrf24l01发送到主机，主机通过nrf24l01接收并在2.8寸tft上显示，最后主机通过gprs模块把收到的信息发送到电脑tcp服务器。-Four slave detect temperature, humidity and light intensity, sent via nrf24l01 to host, received and displayed on a 2.8-inch tft, finally host through gprs module