Application of Fuzzy Logic for Roasting Maturity Level Determination Systems and IOT-Based Coffee Grinding Machines

After the roasting process, coffee is divided into three categories: light, medium, and dark. To determine the level of classification of coffee beans that have been roasted manually, it takes people who are experts in the field of roasting. Each of the three types of roast classifications has a different level of water in the beans. Therefore, this tool was made to identify the roasting level of coffee beans by using the frequency value obtained from changes in the value of the capacitor, which is influenced by the dielectric material that exists between two pairs of copper plates. In addition, knowing the capacitance value and color sensor value for each roast classification is expected to be an additional variable for determining and classifying coffee beans. In previous studies, a coffee bean classification system was developed using different crosssectional areas of capacitors. In addition, an oscillator circuit with three note gates will also be used, and it is hoped that the resulting values will be more stable than previous studies. Internet of Things (IoT) technology and a grinding system are added to improve this system and carry out further research on the previous method. This is the basis of Industrial Revolution 4.0. The system has been tested 10 times and has a 100% success rate in the process.