The basic idea of Smart irrigation system is to monitor the moisture level of soil and automatically irrigate the soil.
In this project, we have used soil moisture sensor connected to the microcontroller, which can sense the level of moisture content present in irrigation field. It has a level detection module in which we can set a reference value. In addition to this, we also have used a submersible water pump module attached to the motor driver.
When the reference value set for dryness of the soil is reached, it automatically initiates the motor pump to irrigate the soil till the wet moisture level of the soil is reached.