DHT21使用范例,硬件连接： P2.0口为通讯口连接DHT11,DHT11的电源和地连接单片机的电源和地，单片机串口加MAX232连接电脑.-DHT21 usage examples, hardware connection: P2.0 port as communication port connected DHT11, DHT11 the power and ground connections and power microcontroller, the microcontroller

基于无线龙的简单点对点协议，接收添加串口通信，发射节点采用DHT11温湿度传感器，在PC上用串口工具查看回传数据时请使用十六进制显示。-Long based on a simple point to point protocol wireless receiver to add serial communications, transmitting node using DHT11 temperature and humidity sensors, with a serial port on t