Abstract: Energy monitoring and management have become essential for improving efficiency and reducing power wastage in industrial environments. Traditional energy meters provide limited monitoring capabilities and do not support real-time remote access to electrical parameters.

This paper presents the design and implementation of an IoT-based smart energy monitoring system using the ESP32 and the PZEM-004T Energy Meter Module. The system continuously measures important electrical parameters such as voltage, current, power, energy consumption, frequency, and power factor with high accuracy. The measured data is processed by the ESP32 microcontroller and transmitted through Wi-Fi for remote monitoring.

The real-time electrical data can be viewed through the Blynk application, enabling users to monitor energy usage from anywhere using a mobile device. This system provides an efficient and cost-effective solution for industrial energy monitoring and management.

Experimental testing with different electrical loads demonstrates that the system provides accurate and reliable measurement results. The proposed system can be applied in industrial environments for smart energy monitoring and improved power management.

Keywords: IoT, Smart Energy Meter, ESP32, PZEM-004T, Energy Monitoring.

Downloads: | DOI: 10.17148/IJIREEICE.2026.14368