A Wireless Multipoint Parameter Monitoring System for Greenhouse Environment

A system of real-time monitoring and wireless transmission of illuminance, temperature and humidity parameters for a greenhouse environment is achieved in the framework of ZigBee protocol stack. It mainly includes two kinds of minimum systems with the cores of Texas Instruments CC2530 chip and ARM STM32F103 chip. CC2530 minimum system completes network nodes function of multipoint parameter monitoring. BPW34S sensors are used to construct the illuminance collection module and SHT10 sensors are used to construct the temperature and humidity collection module. Multipoint parameter data are sampled by CC2530 nodes. A node chip transmits measured data wirelessly to another node based on ZigBee technology. The STM32 minimum system contains a CC2530 which is used to receive data from other sensor node modules through serial port. After the system processes the data, the result is displayed on LCD12864 screen. Experiment shows that data loss rate of this system are zero within 15 m communication distance. This system is suitable for a greenhouse of about 20 m × 25 m area and it has several advantages of low cost, easy installation, and high efficiency.