Design and Implementation of Modbus Protocol for Intelligent Building Security

Internet of Things is a system where appliances are embedded with software, sensors and actuators. The devices are able to transfer data over a network and also communicate with each other [1]. The literature reports that many systems based on single mode of monitoring, power or lighting are not integrated into one control system, so there are complex control cumbersome, high operating costs. To solve this problem, we propose a Modbus protocol design for intelligent building security, All these perception-control-management are integrated into one system. This system adopts the Modbus protocol format for the data communication, the hardware system with processor as ARM5708 industry as the core development board development and design, Using Linux operating system, JavaWeb development and database management technology to achieve data interaction, display, storage, identification and other functions, Completed an embedded network communication protocol gateway and industrial design, and connects the traditional serial connection Modbus fieldbus and Ethernet communication, and finally the application is realized through Modbus TCP protocol. Compared with the previous building security design, we adopted Modbus bus control, which saved the resources of the core development board and effectively applied the Modbus TCP protocol and Modbus RTU protocol. The webpage control end realizes the collection of the temperature and humidity gas concentration of the intelligent building and the detection of the human body infrared. For the purpose of verification and testing, a three-story building prototype was built.