Energy Harvesting Sensors based Internet of Things System for Precision Agriculture

This paper proposes a design of wireless sensor node based on Internet of Things mainly its power unit which is integrated to solar energy for agriculture. The sensor node is developed using NodeMCu with four different sensors namely relative humidity and temperature sensor, soil moisture sensor, soil temperature sensor and luminosity sensor to monitor key parameters related to soil and environment. A power unit of sensor node is designed with Lithium ion batteries and charging of the batteries is maintained by solar panel. The developed node is tested for 24 hours for the battery voltage which proves that the power consumption during daytime is completely maintained while it drops during night.