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Irma Salamah
Politeknik Negeri Sriwijaya
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Journal : bit-Tech

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IoT-Based Alcohol Presence Detection in Soy Sauce Using MQ-3 and ESP32 Almirah, Narita Tria; Taqwa, Ahmad; Salamah, Irma
bit-Tech Vol. 8 No. 1 (2025): bit-Tech
Publisher : Komunitas Dosen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32877/bt.v8i1.2811

Abstract

Ethanol is a compound that naturally forms during the fermentation process of products such as soy sauce, raising concerns about their halal status for Muslim consumers. This research develops an alcohol detection system based on the Internet of Things (IoT) that integrates an MQ-3 sensor, ESP32 microcontroller, and the Blynk mobile application. The MQ-3 sensor detects ethanol vapor, and the ESP32 processes the sensor data and transmits it via Wi-Fi, enabling real-time monitoring through both a 16x2 LCD display and the Blynk app. The system’s calibration process involves standard ethanol solutions with concentrations ranging from 0% to 10%. The sensor output is converted from analog-to-digital (ADC) values to voltage, parts per million (ppm), and percentage estimates. A regression analysis of the sensor data yielded the equation y = 684.59x + 3198.9, with an R2 value of 0.7288, indicating a moderate correlation between ethanol concentration and sensor readings. Using solutions with ethanol concentrations of 1% and 3%, a detection threshold of 5300 ppm was established. Testing on commercial soy sauce samples (0% and 3.08% ethanol) confirmed the system's ability to distinguish between products with and without detectable ethanol, validating its effectiveness. While not designed for precise quantitative analysis, this system offers a practical, economical, and portable solution for initial screening of alcohol in fermented food products, making it a valuable tool for halal product monitoring.
Co-Authors AA Sudharmawan, AA Abdul Rakhman Agnes Manik, Agnes Ahmad Jazuli Ahmad Taqwa Aliffiyah, Muhammad Bayu Alisya, City Ardhela Almirah, Narita Tria Anggielita, Renata Anggraini, Nur Septi Aryanti Aryanti Asriyadi Asriyadi Astari, Devina Bambang Pratama, Bambang Cendrakasih, Aminah Chairunnisa, Dita Ayu Ciksadan, Ciksadan Damayanti, Shinta Eka Susanti Elmerillia, Elmerillia Emilia Hesti Endri, Jon Fadhli, Mohammad Fauzi, Nadiyah Salsabila Gustina, Meli Handini, Wulan Tri Hj. Lindawati Humairoh, Sherina Irawan Hadi Irma Suryani Julianti, Amelia Kurniasih, Wahyuni Kusmanto, RD. Kusumanto, R.D Lindawati Lindawati M. Aris Ganiardi, M. Aris Malinda, Threa Martinus Mujur Rose Mujur Rose, Martinus Mursalin, Zaldy Gumilang Nasron Nasron Ningrum, Shinta Sulistiya Noviani, Fadiah Nurhajar Anugraha Nurmalasari, Aprilliya Oktavia, Nadia Primulia, Muhammad Filly Putri Nur Azizah, Putri Nur Putri, Jullia Fatriana R.A., Halimatussa’diyah Rafiif, Muhammad Rahmadaniar, Desi Rahman, Wahyudi Rahmaniar, Fadhila Desti Rahmika, Rahmika Rakhman, Abdul Halim RD Kusumanto Reza Umami, Reza Rosa, Adelia Rose, Mujur Saskia, Kevi Agis Shendy Pratama Sholihin Sholihin Soleh, M. Zikri Sopian Soim, Sopian Suroso Suroso suzan zefi syafitri, kurnia Syaniah, Yunita Tata, Amanda Tsabita Putri Thayyib, Ahmad Reza Ulhaq, Nida Dhia Valerie, Michelle Wardana, Handava Wibowo, Muhamad Arya Al Ghifari Wulandari, Alysiah