The Research Of Agricultural Micro-environment Multi-parameters Wireless Monitoring System Based On GPRS

With the development of agricultural technology, agriculture environmental monitoring have become increasingly demanding. Timely access to information of field data for the agricultural environment is the important foundation of modern precision management, and it becomes an important area of information agricultural research that how to get various types of agricultural field data fast and effectively. The rapid development of network technology and wireless communication technology, especially the development and maturity of GPRS / CDMA wireless mobile network technology provides an effective way for information monitoring of agricultural.Compared to open-air environment, the parameters of micro-environment enclosure have quite big changes.The design of agricultural micro-environment multi-parameter wireless monitoring system based on GPRS in this paper is aimed at indoor environment like agricultural greenhouses, indoor cultivation for real-time monitoring. The system selects 4 parameters that have close relationship with crop growth, temperature, humidity, carbon dioxide, light intensity, and choose 4 sensors to get environment parameters.The hardware of the system is the data collection terminal. It consists of four parts, the sensor circuit, the microcontroller circuits, the GPRS wireless module circuit and the system power supply circuit. With The MSP430F169 microcontroller as the core, controls sensor circuit to collect the environmental data, and communicates with SIM300 GPRS module through the serial interface at the same time, to do the network connection and data send. Using C + + Builder development platform for programming the monitoring center software interface, realize the real-time data display, graphical curve analysis and database functions.TCP point-to-point connection is adopted in this system, mainly for the monitoring centers that have no network environment. The system can meet different GPRS network access just by modifying the software. So the system has a higher applicable value with good expansibility. After the actual test, the system is stable, the data collected within the accuracy range. The subject is of far reaching importance of agricultural environmental information monitoring technology.