Design and Evaluation of a Compact IoT-Enabled Microfarm for Decentralized Urban Agriculture Applied to the Cultivation of Pleurotus ostreatus (Oyster Mushroom)

We developed and evaluated a compact mushroom fruiting chamber equipped with Internet of Things technologies, designed to support decentralized urban agriculture. The system was constructed from a retrofitted glass-door refrigerator and integrated with Internet-connected sensors and a custom microcontroller to monitor and regulate temperature and humidity continuously. The control unit managed key variables, including temperature and relative humidity, during the cultivation of Pleurotus ostreatus mushrooms. Experimental trials assessed the effectiveness of the IoT-based system in maintaining optimal growth conditions by dynamically adjusting parameters tailored to the fungus’s specific physiological requirements during fruiting. The prototype successfully maintained a stable cultivation environment, achieving an average temperature of 25.0 °C (±0.7 °C) and relative humidity of 90% (±8%). Under optimized conditions (18 °C, with the cultivation block plastic cover preserved), mushroom yield reached 230 ± 2 g per block, corresponding to a biological efficiency of 44% and an estimated productivity of up to 612.04 kg m −2 per year. Furthermore, the system achieved a water footprint of only 4.39 L kg −1 of fresh mushrooms, significantly lower than that typically reported for conventional cultivation methods. These results demonstrate the feasibility of an efficient, compact, and water-saving controlled environment for mushroom cultivation, enabled by IoT-based technologies and organic residue substrates. Remote monitoring and control capabilities support urban food security, reduce transport-related emissions, optimize water use, and promote sustainable practices within a circular economy framework. The system’s adaptability suggests potential scalability to other crops and urban agricultural contexts.