Divided-branch and fixed-point routing for wireless moisture sensor networks

To reduce the problem of data integrity caused by ambient interference and failure of sensor, practical routing protocols for wireless moisture sensor networks in periodically real-time monitoring of soil moisture were discussed based on hardware and software configuration of wireless moisture sensor, periodic work mechanism of networks and directional networks topology. Wireless moisture sensors were distributed as grid in two-dimensional matrix shapes with two bytes binary-coded address. The network was divided into branches according to different number of columns; Data was transmitted via fixed-point inside branch and orderly between branches. Routing protocols of single-branch, double-branch and triple-branch were presented, then analyzed and simulated from data quantity and timeout and data integrity. The result shows that divided-branch and fixed-point routing is better than AODV in energy consumption and data integrity to meet the demand of periodical monitoring of soil moisture.