Development and Evaluation of an IoT-Based Electrical Measurement System for Smart Engineering

Abstract

This work reports the design and experimental assessment of a portable electrical measurement platform that uses Internet of Things (IoT) technology for continuous measurement and remote observation. The prototype combines 40 W and 100 W resistive lamps, an ESP32 controller, a PZEM-016 energy sensor, and a cloud dashboard to collect voltage, current, and power data. The main contribution is the integration of conventional electrical measurement with IoT data acquisition, remote supervision, and automatic recording in one portable unit. Performance was examined experimentally with series and parallel circuits and different load arrangements. Readings from the IoT module were checked against conventional instruments, and values were calculated from Ohm's law and the electrical power relation. The prototype reproduced the electrical behaviour of both circuit arrangements. The series connection produced unequal voltage sharing and much lower power delivery, whereas the parallel connection kept the supply voltage nearly constant and delivered substantially greater power. Across the tested quantities, the difference between IoT and reference readings was below 5%. The system also supports live visualisation, remote access, and automatic storage of measurement records, indicating its suitability for electrical engineering measurement and system analysis.