In order to implement effective water-saving control

a water-saving irrigation system for greenhouse is designed based on Zig Bee networks.The hardware system is built using CC2430 to construct wireless soil moisture sensor networks

which are composed of wireless sensor nodes

control nodes

coordinator nodes.The software part includes data collection and transmission of rooter node

data receiving and transmission of coordinator node

monitoring terminal administration.The monitoring software running on upper machine is developed by LabVIEW language that provides a friendly human-machine interactive interface.The system realizes automatic collection of soil moisture and automatic irrigation according to water requirement of crop.The experimental results show that the system has many advantages

such as low power consumption

low cost

good reliability

easy for installation and maintenance

etc.Water-saving can be achieved if control parameters are set reasonably.