Control of Temperature and Air Humidity in a Solar Dryer Dome Using Arduino Uno-Based Data Logger

Abstract

Residents of Karang Sidemen village have been using a solar dryer dome to efficiently dry coffee, saving drying time due to the unpredictable climate during coffee drying. Control of temperature and air humidity in the solar dryer dome is crucial to achieve ideal drying conditions. This study aims to design control of temperature and air humidity inside the solar dryer dome using an Arduino Uno-based data logger. The research method used is experimental, focusing on the development of automatic temperature and air humidity control systems in the solar dryer dome. The data collection technique involves monitoring air conditions periodically during the drying process. The data logger records temperature and air humidity data from the SHT10 sensor every 30 minutes. Based on the research results, inside the solar dryer dome, the temperature peaked at 63.5°C, and the lowest temperature recorded was 20.6°C. The highest recorded air humidity was 85.4%, and the lowest was 12.6%. The exhaust fan in the solar dryer dome is controlled based on the air humidity level. The exhaust fan is active when air humidity is ≥40% and inactive when ≤35%. Air humidity control aims to maintain ideal humidity and prevent damage to the drying coffee. Based on the research results, it was found that the device can record temperature and air humidity data and control air humidity inside the solar dryer dome.