Micro, Small, and Medium Enterprises (MSMEs) in Indonesia still largely rely on traditional drying methods, such as sun drying, which are inefficient during rainy seasons. This study aims to design and test a food drying system based on Arduino Uno and Internet of Things (IoT) to enhance drying efficiency and production quality. The system integrates a DHT11 sensor for automatic temperature and humidity monitoring, combined with a blower, heating element, and digital timer. Research was conducted using experimental and development methods at the Industrial Engineering Laboratory of STIKUBANK University, Semarang. Results show a significant reduction in moisture content, with the highest reduction found in crackers (92.5%). Regression and ANOVA analysis confirmed that temperature and drying time significantly affect drying efficiency, while humidity has less impact. The system improved hygiene, consistency, and reduced weather dependency, making it a suitable solution for MSME productivity. Keywords: Arduino, Drying, Efficiency, IoT, Sensor
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