Smart Energy Meter With Voltage Protection Source Code

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.

⚡ 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.