Rancang Bangun Alat Uji Emisi Kendaraan Bermotor Dengan Pengambilan Keputusan Fuzzy Logic

The significant increase in the number of motor vehicles in Indonesia has become a major contributor to air pollution in urban areas. To address this issue, vehicle emission testing is an important step in controlling air pollution levels. This study aims to design and build a motor vehicle emission testing device capable of detecting exhaust gases such as carbon monoxide (CO), carbon dioxide (CO₂), hydrocarbons (HC), and nitrogen oxides (NOx). This system integrates an ESP32 microcontroller-based sensor equipped with Wi-Fi and Bluetooth connectivity and utilizes the fuzzy logic method as a decision-making system in evaluating emission measurement results. This tool is designed so that the test results can be displayed directly on an OLED screen and transmitted wirelessly. Fuzzification, inference, and defuzzification processes are applied to determine the emission status of vehicles in the categories of “Safe,” “Needs Inspection,” or “Dangerous.” The results of the design show that this system works in real-time and can be used practically in the field. This tool is expected to be a portable solution for testing motor vehicle emissions and to support air quality monitoring by the community and relevant institutions.