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The increasing demand for sustainable agriculture and resource utilization accelerates the incorporation of renewable energy systems with cloud-connected IoT solutions. Here is a solar- powered IoT-based smart agriculture system, which aims to automate environmental monitoring and irrigation using NodeMCU ESP8266. The proposed model contributes to temperature and humidity sensing, PIR-based field activity monitoring, and automatic actuation of the water pump based on soil and climatic conditions. Real-time data acquisition and device control can be enabled using the Blynk IoT cloud platform for ensuring remote accessibility for continuous supervision. A solar panel with battery storage ensures disturbance-free power supply in rural and off-grid areas, enhancing the reliability and sustainability of the system. Experimental results represent stable sensor communication, responsive pump actuation, and efficient renewable energy use. This system presents how the integration of IoT, cloud computing, and renewable energy enables precision agriculture, limits water wastage, and offers practical eco-friendly farming solutions