Automatic Irrigation System Using Wsn

An automated irrigation system is developed to optimize water use for agriculture crops. The system has a distributed wireless sensor node network of soil moisture, temperature sensors and humidity sensor placed in the soil. Energy conservation is a very critical issuein wireless sensor networks. In this paper a TDMA based MAC protocols are used to conserve the energy in wireless sensor networks which is used in an irrigation syste. An algorithm is developed with threshold values of moisture level, temperature of the soil and humidity sensor that are programmed into microcontroller based gateway to control irrigation in a field. Also two methods based on TDMA scheduling are used. The first one is direct communication method, in which each node transmitted the data directly to the sinknodeandotheroneisdataaggregationmethodinwhichnodes are grouped into clusters to saveenergy