Rancang Bangun Alat Ukur Massa Tertelusur Berbasis Internet of Things (IoT)

Abstract

This study aims to develop a digital mass measurement device with a maximum capacity of 200 kilograms that is traceable to the national mass standard (M2) and integrated with the Internet of Things (IoT) using the Blynk application. The increasing demand for mass measurement instruments that are not only accurate and traceable but also efficient and digitally integrated aligns with the advancement of Industry 4.0 technologies. The system is designed using a strain gauge–based load cell to detect mass variations and an HX711 module to amplify and convert the signal into digital form. An ESP32 microcontroller functions as the central controller, responsible for processing and wirelessly transmitting measurement data via Wi-Fi. Blynk is utilized as the smartphone-based user interface due to its flexibility, ease of use, and compatibility with the ESP32 platform, enabling users to monitor measurement results in real time and receive notifications when the measured mass exceeds predefined limits. The device is calibrated to ensure accuracy and traceability to the M2 standard within the national metrology system. Performance evaluations under various load and environmental conditions demonstrate that the instrument achieves a relative error of less than 1% and consistently transmits data without significant delay. The integration of IoT and Blynk enhances monitoring convenience and improves the efficiency of data management. This device shows strong potential for application in industrial settings, research laboratories, and small- to medium scale enterprises that require smart, efficient, and mobile-accessible mass measurement systems.