Design an Intelligent Environment Control System for GreenHouse Based on RS485 Bus

As control equipments used in industry can hardly be transplanted to greenhouse environment control directly, and the greenhouse control systems designed in the past are not that adaptable in practice, a new greenhouse control system based on RS485 bus is realized in this paper. When the system is running normally, the control targets are fulfilled by smart modules distributed in every greenhouse, while data collecting, state monitoring and remote login are accomplished by upper PC. If manual control is needed, auto-control will be isolated in two levels, which ensures the greenhouses can be controlled if system malfunction or extreme climate happens.