Precision agriculture has become a key strategy to optimize resource use and reduce environmental impact. In this regard, the cultivation of rice seedlings in greenhouses is gaining popularity, especially in areas where mechanized transplanting is required to ensure the qual- ity and quantity of seedlings. A control system has been developed that uses the Internet of Things (IoT) technology for greenhouse rice cultivation. This system employs IoT control technology to provide optimal temperature, humidity, and essential macronutrients such as nitrogen, phosphorus, and potassium (NPK) needed for rice seedling growth. The system mitigates the adverse effects of excessive heat or water scarcity at the rice seedling development stage. Studies demonstrate a significant improvement in resource use efficiency. It highlights the importance of the proposed IoT-based water man- agement system, resulting in reduced water waste and increased crop yields. It positions itself as a valuable tool to mitigate water scarcity challenges, increase crop yields, and promote environmen- tally sustainable agricultural practices.