Design and Development of an Agricultural Wheeled Sprayer for Pesticides

This study presents the design and development of an IoT-based Agricultural Wheeled Sprayer for efficient and safe pesticide application. The main objective of the proposed system is to reduce human exposure to harmful chemicals and improve spraying efficiency using automation. The system is built using an ESP32 microcontroller integrated with a DHT11 temperature and humidity sensor, 16×2 LCD display, four geared DC motors with wheels, motor driver module, water pump with nozzle mechanism, relay module, lithium-ion battery, and water tank. A web-based dashboard is developed to monitor real- time temperature and humidity data in graphical form and to remotely control the robot’s movement (forward, backward, left, right) and pump operation via Wi-Fi. The experimental results demonstrate reliable wireless control, stable environmental monitoring, and uniform pesticide spraying performance under field conditions. The system reduces labor effort, ensures operator safety, and enhances precision in agricultural spraying. The study concludes that the proposed Agribot provides a cost-effective and scalable solution for smart farming applications.