Abstract
An environmental monitoring system is designed to deal with the problems in current solar greenhouse, which mainly composed of concentrator (data exchange terminal) and sampler (sampling terminals). Information of environmental parameter acquired by different sensors in sampling terminals were transmitted to the concentrator by the radio frequency module, a storage circuit was designed in concentrator using secure digital card, which can meet the need for mass data storage, data come from all monitoring points were stored into SD card, Gateway hardware platform were structured based on STM32F103 microprocessor and SIM900A in the data exchange terminal, environment parameter data were sent to the server of monitoring center via GPRS network finally, the system solve the shortcomings of GSM communication using GPRS technology to transmit data, STM32 processor with low power consumption, low price, high processing speed and high performance improve the performance of this system, The preliminary experimentation proved that it can get the environmental parameters data within the error rang, this system has advantages such as simple structure, more greater data processing capabilities, better real-time, high reliability and easy to install and operate.
