Design of Wireless Sensor Network Node for Monitoring Rice Field
Hua-Qiang Chen, Jiang-Peng Weng, Fenglian Tie, Baoxia Sun, Weixing Wang · 2017
A wireless sensor network (WSN) node is designed for monitoring rice field in order to solve the existing problems of poor real-time performance, Low system stability and large monitoring area, etc.The node uses a STM32F103VET6 as a processing core, and a WLK01L39 RF chip is used in wireless communication module, while the sensor module is composed of the air temperature and humidity sensor, Light intensity sensor and soil moisture sensor.uC/OS-II is applied as operation system to realize multitask scheduling running.The sensor node applies a mechanism as sleeping and waking up work modes to reduce power consumption.The mean current consumption of sensor nodes raged from 23.24mA to 32.82mA under operating mode and 0.026mA under sleeping mode.The results of a two-week networking experiment indicated that the average PLR (Packet Loss Rate) of network was 0.76%.In conclusion, the design of sensor node is suitable for effective monitoring of rice field.