To achieve precision irrigation for Arabica coffee plantations and purpose of yield boosting and water saving

a drip irrigation automatic control system

which mainly comprise of sensor node

cluster head

control node and sink node

is designed based on wireless sensor networks（WSNs）.Effective communication distance between nodes is confirmed to be 50 m by test

and on this basis irrigation area division and nodes deployment is carried out by using the method of static cluster and node location placement

each irrigation area is a square

whose length of side is 50 m

and there are one cluster head

one control node and four sensor nodes placed in an irrigation area.Data wireless transmission between nodes is realized by combining regular communication with time synchronization technology and sleep technology

and information include soil water content

light intensity

air temperature and humidity are fused

then automatic control for drip irrigation is realized by using zoning rotation irrigation strategy based on fusion data.Test results show that the system achieves design goal and can be applied for precision irrigation management in Arabica coffee plantations.