| The application of IOT technology in greenhouse industry greatly improves the production efficiency and economic benefit of greenhouse industry. The traditional artificial control methods can not adapt to the requirement of modern greenhouse production. Building the IOT intelligent greenhouse monitoring system based on IOT technology solve the problem very well. In the IOT greenhouse intelligent monitoring system, the IOT gateway is the core equipment. The gateway connecting wireless sensor network and Internet that provided a data channels linked the ZIGBEE data acquisition module and Internet client is the core carrier to running the greenhouse intelligent monitoring system. Research and development of the IOT gateway platform is the first basic work to build the IOT greenhouse intelligent monitoring system, also is the main research targets of this paper. Based on the completion of the gateway platform, a distributed monitoring system is built.The IOT gateway platform in this paper is built based on the ARM processor S5PV210 and Linux operating system. The gateway have the ability to access the Internet and wireless sensor network. This paper analyze the functional requirements of the gateway platform, design hardware and software architecture to realize the basic functions. This paper set up an embedded software development environment and chose a development board based on the hardware architecture design. The gateway platform software system is the main work in the gateway development that including the design of bootstrap, the transplantation of the Linux kernel and the root file system. In the bootstrap programming design, firstly analyze the start mode of S5PV210 and the general characteristics of bootstrap, then study the source of the U-BOOT, last modify the source code to made a bootstrap programming according to the characteristics of the development board hardware and the boot feature of Linux system. In the Linux kernel transplantation, firstly analyze the five subsystems function and the Linux kernel source code package, then modify the kernel source code to made a feasible Linux kernel in view of the development board hardware features. In making the root file system, firstly determine the necessary directory and file of the root file system, then use BusyBox to made a root file system. Finally, burning the each function module image of the software system, build complete gateway platform software system. Using the gateway platform as the core equipment and the ADAM wireless sensor network modules, a distributed monitoring system is built. The development completion of gateway platform and the construction of monitoring system laid a good foundation for subsequent development of the IOT greenhouse intelligent monitoring system. |
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