SOLAR POWERED HYDROPONIC CONTROL SYSTEM

Abstract

With accelerating population growth, urban expansion, reduction in cultivable land, water stress, and climatic uncertainties, there is an urgent need for sustainable agricultural practices. Hydroponics presents a viable alternative to conventional soil-based farming by cultivating crops in a nutrient-rich aqueous medium. This technique offers significant advantages including reduced water consumption, precise regulation of growth parameters, and the ability to produce crops in space-constrained or non-arable regions. Despite these benefits, the productivity of hydroponic systems heavily depends on maintaining optimal environmental conditions such as temperature, humidity, and water availability. Traditional manual monitoring is inefficient and prone to delays in corrective action. The convergence of embedded systems and renewable energy technologies provides a promising pathway for developing automated and self-sustaining hydroponic setups. This paper presents a review of a Solar Powered Hydroponic Control System implemented using the ESP32 microcontroller. The system architecture incorporates environmental sensors for temperature and humidity, water level detection, photovoltaic panels, rechargeable battery backup, cooling mechanisms, and an LCD interface for real-time monitoring. The ESP32 serves as the core processing unit, acquiring sensor data and regulating ventilation based on predefined thresholds. Solar energy serves as the primary power source, supplemented by battery storage to ensure uninterrupted operation during inadequate irradiance. The review further examines the significance of hydroponics, sensor-driven monitoring, IoT in agriculture, solar energy integration, and microcontroller-based automation. Existing challenges identified include limited capability for nutrient, pH, and EC monitoring, absence of remote accessibility, and scope for energy optimization and intelligent control strategies. The findings suggest that the fusion of hydroponics, solar power, and embedded automation can contribute toward developing energy-efficient, sustainable, and resource-conserving agricultural systems.