Smart Energy Saving and Monitoring Meter using IoT

Abstract

The rapid increase in electricity consumption has created a need for intelligent energy monitoring and saving systems. Traditional energy meters only measure total energy usage and do not provide real-time monitoring or control features. This project presents a Smart Energy Saving and Monitoring Meter using IoT that continuously measures electrical parameters such as voltage, current, power, and energy consumption using an ESP32 microcontroller and sensing modules. The system transmits real-time data to a cloud platform, allowing users to monitor electricity usage remotely through mobile or web applications. It also includes automatic load control using a relay module, which disconnects the load when power consumption exceeds predefined limits. This improves energy efficiency, reduces electricity wastage, and enhances electrical safety. Overall, the proposed system provides a low-cost and reliable solution for smart energy monitoring and efficient power management.

Introduction

The text presents the design and implementation of a Smart Energy Saving and Monitoring Meter using IoT to improve energy management and reduce electricity wastage. Traditional energy meters only display total energy consumption and do not provide real-time information about electrical parameters such as voltage, current, and power usage. This makes it difficult for users to understand their energy consumption patterns and identify unnecessary power wastage. To solve this problem, the proposed system continuously monitors electrical parameters using sensors and a microcontroller, processes the data in real time, and transmits it to a cloud-based platform for remote monitoring through mobile or web applications.

The system is designed as a low-cost, efficient, and intelligent energy monitoring solution. It includes features such as automatic alerts during abnormal power consumption and relay-based load control to disconnect appliances during unsafe or excessive energy usage. This helps improve electrical safety, energy conservation, and sustainable power usage.

The literature survey highlights previous research in smart metering, smart grids, IoT-based energy management, and wireless communication technologies. Studies such as Sarah Darby’s work on smart metering demonstrate how real-time monitoring improves consumer awareness and energy-saving behavior. References related to the ESP32 explain its wireless communication and power management capabilities, making it suitable for IoT applications. Other studies discuss smart grid communication systems, automated control mechanisms, and home energy management systems that support efficient electricity usage.

The proposed system architecture consists of several major components:

• AC mains supply and sensing units: A PZEM-004T sensor module measures voltage and current from the 230V AC supply.
• Regulated power supply: Converts high-voltage AC into low-voltage DC required by system components.
• ESP32 microcontroller: Acts as the central processing unit, calculating voltage, current, power, and energy consumption in real time.
• LCD display: Shows real-time electrical parameters and system alerts locally.
• IoT communication module: Uses the built-in Wi-Fi of the ESP32 to upload data to the cloud for remote monitoring.
• Relay control mechanism: Automatically disconnects the load if abnormal power conditions are detected.

The methodology involves continuously monitoring voltage, current, power, frequency, and power factor using the PZEM-004T. The ESP32 processes sensor data, compares values with predefined thresholds, and generates alerts when abnormalities such as overloads, over-voltage, or under-voltage occur. The processed information is displayed locally and transmitted to a cloud platform for remote analysis. A relay mechanism disconnects the electrical load during unsafe conditions to prevent energy wastage and improve safety.

Conclusion

The Smart Energy Monitoring and Saving Meter using IoT provides an efficient and reliable solution for real-time energy monitoring and intelligent power management. By integrating voltage and current sensors with the microcontroller, the system continuously measures important electrical parameters and provides accurate information about energy consumption. The IoT-based monitoring feature allows users to access real-time data, analyze energy usage patterns, and make informed decisions to improve energy efficiency. Another important feature of the system is its automatic control capability. The relay mechanism operates based on predefined energy limits and helps in reducing unnecessary power consumption. The system also supports remote monitoring through a cloud platform, which increases user convenience and improves electrical safety. Overall, the project demonstrates a low-cost, user-friendly, and scalable smart energy management solution that can contribute to energy conservation and sustainable power usage.

References

[1] Darby, S. (2010). Smart Metering and Householder Engagement. [2] Espressif Systems (2023). ESP32 Technical Reference Manual. [3] Espressif Systems (2024). ESP-IDF Programming Guide. [4] Gungor, V. C. (2011). Smart Grid Communication Technologies. [5] IEEE Smart Grid (2023). Smart Grid Overview. [6] Javaid, N. (2014). A Survey of Home Energy Management Systems.

Copyright

Copyright © 2026 Mayuresh Chavan, Yash Sheshware, Soham Gadge, Atharva Kilaje, Siddhesh Desai. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.