在一个多节点的无线气象站集成芯片的pic24fj192单片机

　　在一个多节点的无线气象站集成芯片的pic24fj192单片机

　　嵌入式的世界我们生活是从不同的MCU和CPU千共同发展。为了支持数据和信息的自由流动，许多网络是相互连接的，常常是无线的。这种数据交换提供了一种更方便、更安全的生活方式。价格Digi-Key的气象中心说明了各种微控制器可以连接无线通信手持智能手机。天气中心是太阳能供电，具有多种单片机和无线传感器网络的多节点项目一起。这些网络节点提供了气象条件和太阳能电池阵列输出功率的快照，为主要气象中心的电源总线提供了信息。

　　The PIC24FJ192GA110 MCU implementation

　　The PIC24FJ192GA110 MCU was used as a weather node to return wireless readings of temperature， humidity， and Lux （luminous flux density） from each of the respective sensors. The node also monitors its own voltage through the use of a high resistance potential divider and voltage follower. These analog signals are read on a sixteen point average via the on-chip ADC. The human-machine interface uses change notification （CN） interrupts via hermetically sealed tactile pushbutton switches and an LCD screen to update the local user with current sensor data.

　　Operating on an average current draw of as little as 9.25 mA， the node was designed with low power and wireless connectivity in mind. Running at 57，600 Baud， the system uses the PIC’s UART2 port as a means of serial communication with an XBee Pro unit （XBP24-BWIT-004-ND） in pass-through mode. This allows plug-and-play connectivity as if the PIC’s UART port were physically connected on a hard line.