Abstract: In order to solve the problems of limited communication distance, large power consumption and no extensive network in soil moisture monitoring system, a field soil moisture monitoring system based on LoRa was developed, remote transmission, control and display of soil moisture monitoring information. The soil moisture data collected by the soil moisture sensor was uploaded to the gateway through the LoRa communication module, and the gateway collects the data and transmits it to the remote monitoring platform, a monitoring system of soil moisture in urban farmland with wide monitoring range, low power consumption, flexible network and long-distance communication was constructed. The system improves the working efficiency of soil moisture monitoring, and is very suitable for the scene where there are many data monitoring and collecting stations in large-area farmland.

Key words: soil moisture, LoRa, low power consumption, monitoring system