LOW-COST WIRELESS SOIL MOISTURE MONITORING SYSTEM
Uglješa Jovanović, Igor D. Jovanovic, Zoran Petrusic, Dragan D. Mančić · SCIndeks · 2015
This paper presents the design and operation of a low-cost system for soil moisture monitoring. The presented system is developed with inexpensive off-the-shelf components and it is capable of measuring soil moisture tension up to 200 kPa. The system is modular and consists of a base unit connected to a PC via USB communication and a sensing node based on a Watermark 200SS soil moisture sensor. The system is designed for practical application in agriculture hence the maximal distance between base unit and sensing node in open space is up to 10 km. A proper virtual instrument made in LabVIEW is developed for data acquisition, visualization and data storage. Calibration procedure is presented along with the obtained test results.