Sistem Monitoring Suhu Kulkas Display Berbasis Internet of Things dengan Metode Prototype pada Metropolitan Mall Bekasi

Abstract

ABSTRAK  Monitoring suhu kulkas display di Kantin Matahari Department Store Metropolitan Mall Bekasi masih dilakukan secara manual sehingga perubahan suhu dan kondisi pintu kulkas tidak dapat dipantau secara terus-menerus, yang berpotensi menyebabkan penurunan kualitas produk. Penelitian ini bertujuan merancang dan mengimplementasikan sistem monitoring suhu kulkas display berbasis Internet of Things (IoT) yang mampu melakukan pemantauan secara real-time serta memberikan peringatan ketika terjadi kondisi abnormal. Metode pengembangan yang digunakan adalah Prototype dengan tahapan communication, quick plan, modelling quick design, construction of prototype, serta deployment dan delivery. Sistem dikembangkan menggunakan mikrokontroler ESP32, sensor suhu DS18B20, magnetic switch, LCD TFT, buzzer, Blynk, dan Telegram sebagai media monitoring dan notifikasi. Pengujian sistem dilakukan menggunakan Alpha Testing dengan metode Black Box untuk memastikan setiap fungsi perangkat keras dan perangkat lunak berjalan sesuai rancangan. Hasil pengujian menunjukkan seluruh fungsi sistem dapat berjalan dengan baik, meliputi pembacaan suhu secara real-time, deteksi kondisi pintu kulkas, tampilan informasi pada LCD TFT dan Blynk, serta pengiriman notifikasi melalui Telegram ketika terjadi kondisi abnormal. Sistem mampu memberikan peringatan ketika suhu berada di luar rentang 2–8°C dan ketika pintu kulkas terbuka melebihi batas waktu yang ditentukan. Dengan demikian, sistem monitoring yang dikembangkan dapat meningkatkan efektivitas pemantauan suhu kulkas display, mempercepat deteksi kondisi abnormal, serta membantu mengurangi ketergantungan terhadap pengecekan suhu secara manual. ABSTRACT  The temperature monitoring of the display refrigerator at the Matahari Department Store Canteen, Metropolitan Mall Bekasi, is currently performed manually. As a result, continuous monitoring of temperature fluctuations and the refrigerator door's condition is not possible, potentially leading to a degradation in product quality. This research aims to design and implement an Internet of Things (IoT)-based temperature monitoring system for display refrigerators, capable of performing real-time monitoring and providing alerts during abnormal conditions. The development method utilized is the Prototyping model, comprising the stages of communication, quick plan, modeling quick design, construction of prototype, and deployment and delivery. The system was developed using an ESP32 microcontroller, a DS18B20 temperature sensor, a magnetic switch, a TFT LCD, and a buzzer, with Blynk and Telegram serving as the monitoring and notification media. System testing was conducted through Alpha Testing using the Black Box method to ensure that all hardware and software functions operated according to the design. The test results indicated that all system functions operated effectively, including real-time temperature readings, refrigerator door condition detection, information display on the TFT LCD and Blynk, as well as notification delivery via Telegram when abnormal conditions occurred. The system successfully issued alerts when the temperature fell outside the 2–8°C range and when the refrigerator door was left open beyond the specified time limit. Therefore, the developed monitoring system can enhance the effectiveness of display refrigerator temperature monitoring, accelerate the detection of abnormal conditions, and reduce reliance on manual temperature checks.