Design Of The Iot Gateway For Agriculture Based On STM32

With the development of economy and society, the modern agricultural has beginning. In 2009, the Internet of things was officially promoted to the national strategy level, so agricultural ITO opens the development way of opportunity. Greenhouse agriculture collisions with Internet technology has given rise to a new agricultural production mode that agricultural greenhouse ITO.Use the sensor technology, wireless technology, automatic control technology, measurement and control technology to develop the agricultural Internet of measurement and control system which has the characteristics of remote monitoring and control is necessary. The system physically includes acquisition controller, gateway, and the upper machine, and includes acquisition and control on the function. The main function of acquisition is to collect the temperature, humidity, light, CO2 and other data of the greenhouses, then transfer the data to the upper machine through the gateway. The main function of control is that upper machine remote control the shutter machine, film machine, grow lights and so on in the greenhouse. As the gateway is important, so in this paper the design of the gateway will be introduced.The function of the gateway is realized data gathering, upload and processing remote user control information. The IOT gateway uses STM32 as the MCU, μC/OS-Ⅱ as the embedded operating system. And the IOT gateway is a join point of public network and wireless sensor network in greenhouse monitoring and control system. Because of the electric and network is instability, the design can realize the cable and wireless communication between the gateway and the upper computer.The experiment proved that the IOT gateway can realize the function of connect upper computer and acquisition. And the design improved the compatibility and better meets the needs of complex agricultural environment. And the system realized the remote control of greenhouse.