Penerapan Sistem Kontrol Kadar Air Biji Kopi Arabika pada Integrated Coffee Dryer Pulper Machine Off-Grid Solar System Berbasis Mikrokontroler

Sambaroroh, Dzurotus Tzaniyah Emilia Putri (2025) Penerapan Sistem Kontrol Kadar Air Biji Kopi Arabika pada Integrated Coffee Dryer Pulper Machine Off-Grid Solar System Berbasis Mikrokontroler. Undergraduate thesis, Politeknik Negeri Jember.

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Abstract

The industrial revolution 4.0 almost all technology and human work will be combined with microcontrollers. Plantations are one of jobs that support the economic welfare of Indonesian people, one of which is coffee plantations. Based on this, innovation is needed to combine microcontroller technology with coffee processing to improve the welfare of coffee farmers in Indonesia. The application of a microcontroller in the form of an Arduino Uno-based water content control system on a drying machine in an integrated coffee dryer pulper machine off-grid solar system will help the Sumber Kembang coffee farmer groups. The research methods used are literature studies, system design, preparation of tools and materials, system creation, data collection, data analysis and conclusions. The results of this study were built using 1 unit of 240Wp solar panels, 2 units of 12V 65Ah batteries installed in series, a microcontroller (Arduino Uno), a YL-69 coffee bean humidity sensor, and a heater. The system was tested for 3 days with the average daily power consumption of the drying machine being 52.9Watt. Testing was also carried out on the rate of water content reduction, obtained data of 6.67% per hour to reach 12% water content, it takes 7.2 hours from the initial water content of 60%. The quality of Arabica coffee beans dried using this system is superior compared to manual drying results. The stability of temperature, humidity, and water content in coffee beans in the drying room results in better coffee bean color and minimizes the risk of mold contamination.

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