| This research is the application of advanced technology of the Internet of things, the embedded object system linked server as the core, using Zigbee network and WiFi network as the communication terminal, and regarding the temperature, humidity, air pressure as data carrier, the entire system is completed by top-down design. The one station type embedded server used in design, which integrates the PC server, the gateway, the routing function etc, and it is based on the special requirements of the IOT application, and it is improved and streamlined from the traditional Internet server. In this study, the hardware carrier is embedded system, and it has the advantages of small size, low power consumption, which can be power supplied with PoE, solar energy. The installation and implementation of the hardware is also very flexible. From the perspective of equipment interconnection, the embedded content server supports PPPoE protocol and possesses AP function, and it can directly access Ethernet without the help of router, realizing the terminal access control through the Ethernet; it can be connected to the3G network through the USB port and configured with the built-in Web interface, realizing the3G is connected to the Internet function. It can be connected to the Zigbee network coordinator through the external interface, so as to realize the integration of ZigBee network, WiFi network, and Ethernet.The whole deployment of embedded object server and the Zigbee network, WiFi network and Ethernet network are closely linked and interconnected. In the past, the solution is using Zigbee TCP/IP gateway to process, and then connected with the server. In this project it is fully embedded in object server hardware resources, and makes the serial port connect with the Zigbee coordinator, through a custom serial protocol OSI seven layer structure, physical layer and application layer are connected directly, and the intermediate links is saved. The implementation of hardware design is the combination of base and core board. The characteristic of it is flexible assembly. Considering the system upgrade requirements in the design, it can be reserved interface. The modular design of sensor circuit, has the advantages of low cost and convenient debugging. Thanks to the modular hardware design, it can locate the problem or fault fast during system integration and debugging process, and can be solved individualized. Besides, server firmware compiling, the Web server selection, the underlying support for installation and configuration, network security and other functions are achieved in the process of design. Through the analysis and comparison of the allocation scheme, the whole platform Web server deployment is completed. Through Web server deployment and refinement of the system function, it is realized in the process of the Web program design one by one. Considering the expansibility of user functions in the project design, respectively taking the timing trigger and event triggering device control and data uploading, generally speaking, event triggered by the user directly to hardware access control, giving full play to the real-time of the system, and network terminal energy consumption will be in normal working condition. Timing the trigger is according to a good task which is set already, setting time to upload data, when the embedded object server and network terminal can enter the sleep state, so as to meet the needs of special situation. In the aspect of Web, man-machine interaction, it is realized and implemented the Webapp interface. In the different test of user terminal assessment, it has a very good performance. Through programming practice, I have an in-depth understanding of the MVC framework, and have my own profound understanding about the similarities and differences between Web programming and software programming, and finally the software design is completed. Through integration, assembly, debugging success, eventually the design task is accomplished. |
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