SOLAR POWERED SENSOR BASE IRRIGATION SYSTEM

This review throws light on development procedure of an embedded system for solar based Off-Grid irrigation system. Solar power is absolutely perfect for use with irrigation systems. Using Solar Panel, the sun energy will converted to electrical power and saves in to batteries. When the sun is rising and shining, the solar panel will absorb the energy of the sun and the energy will keep in the battery. Light Detecting Resistors (LDR’s) are placed on the solar panel which helps in tracking maximum intensity of sunlight. For generation of maximum energy, it is important to maintain solar panels face always perpendicular to the sun. This tracking movement of the panel is achieved by mounting the solar panel on the stepped motor. This stepped motor rotates the mounted panel as per signal received from the programmed microcontroller. The microcontroller used in this project is from AVR family.  Soil moisture sensor is placed inside soil to sense the moisture conditions of the soil. [1] Based on moisture sensor values, the water pump is switched on and off automatically. When moisture level of the soil is reaches to low, the soil moisture sensor is sending the signal to microcontroller to start the pump by using stored solar energy. Same time, using GSM technique microcontroller is sending message on farmers mobile about pump status. The microcontroller completes the above job as it receives signals from the soil moisture sensors, and these signals functions as per program stored in ROM of the microcontroller. The LDR’s values, soil moisture values, condition of the pump i.e., on/off are displayed on a 16x2 LCD which is interfaced to the microcontroller.