Principle and design of a Zig Bee-based soil humidity monitoring system are presented.High power Zig Bee wireless data transmission module is adopted to reduce the node effectively

the communication reliability is enhanced.Used the solar cell as power supply

the node is enabled to work stably for a long time.It can be used in the real-time monitoring of the soil’s temperature & humidity

the state of moisture retention information of the soil is supplied for the automatic spray irrigation or drip irrigation.The experiments prove that this system has advantages of high reliability

real-time and low cost

it is ideal for monitoring soil temperature and humidity needs.