Smart Energy Meter With Voltage Protection Source Code With Project Report

Description

Take control of your electricity usage with this Smart IoT Energy Meter, powered by ESP32 and PZEM004T, designed for real-time monitoring, intelligent protection, and remote access.

This system continuously measures voltage, current, power, energy consumption, frequency, and power factor, while providing automatic over-voltage and under-voltage protection to safeguard your appliances.

With a sleek web-based dashboard, you can monitor live data, configure settings, change WiFi networks, and track electricity cost—all from your phone or computer.

Demo Dashboard

Key Features

✔ Real-Time Monitoring

• Voltage, Current, Power, Energy (kWh), Frequency, Power Factor

✔ Smart Voltage Protection

• Over Voltage (OV) Protection
• Under Voltage (UV) Protection
• Automatic relay cutoff & auto restore

✔ IoT WiFi Dashboard

• Live data updates every few seconds
• No mobile app required
• Works on any browser

✔ Custom Currency Support

• Enter any currency symbol (₹, $, Rs, etc.)
• Real-time electricity cost calculation

✔ WiFi Manager Integration

• Easy first-time setup
• Change WiFi network directly from dashboard

✔ LCD Display (20×4)

• Real-time readings
• WiFi & system status

✔ Buzzer Alert System

• Alerts during voltage faults

✔ Data Storage

• Settings saved in LittleFS
• No data loss after restart

What You Will Find?

Smart Functionalities

• Automatic load restore after voltage normalization
• Handles no-AC condition safely (no false readings)
• Clean UI with gauge visualization
• WiFi signal strength & IP monitoring

Hardware Used

• ESP32 Development Board [Buy From Here]
• PZEM004T v3 Energy Meter [Buy From Here]
• 20×4 I2C LCD [Buy From Here]
• 2-Channel Relay Module [Buy From Here]
• Buzzer [Buy From Here]
• Veroboard PCB [Buy From Here]
• Power Supply Module [Buy From Here]

Applications

• Home energy monitoring
• Smart protection system
• Industrial voltage safety
• DIY IoT projects
• Smart home automation

Why Choose This Product?

This is more than just an energy meter—it’s a complete smart energy management system combining monitoring, automation, protection, and IoT control in one powerful solution.