Electricity Metering via Internet Network System

Abstract

The objectives of this research are: (1) to develop an electricity metering device capable of communicating through an internet network, and (2) to evaluate the device’s performance for data collection to support energy analysis and the development of energy conservation measures in accordance with the office’s electricity reduction policy. The device was designed to transmit real-time electrical data via the internet and incorporates a PZEM-004T V3 module to measure voltage (V), current (A), power (W), energy (kWh), power factor, and frequency (Hz). Communication is achieved through serial interfacing with an ESP32 microcontroller equipped with Wi-Fi capability. The collected data is sent via Wi-Fi for storage and visualization on the NETPIE 2020 cloud platform.

The device’s measurement performance was evaluated by comparing its results with those obtained from a KYORITSU 6305 digital power analyzer, which served as the reference instrument. Statistical analysis included calculating mean values and percentage errors.

The results show that the developed internet-based electricity metering device can accurately measure key electrical parameters and display them on the NETPIE 2020 platform. When compared with the reference instrument, the device demonstrated an average voltage measurement error of 0.070% and an average current measurement error of 1.674%, indicating minimal and acceptable deviations. The findings confirm that the device provides reliable real-time monitoring, supporting effective energy planning and load management. It offers a practical tool for promoting energy conservation and enhancing resource efficiency within the office environment.