Smart Energy Meter With Voltage Protection Source Code

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. .notice-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.65); display: flex; justify-content: center; align-items: center; z-index: 9999; } .notice-popup { background: #ffffff; width: 90%; max-width: 440px; padding: 26px 22px 18px; border-radius: 10px; text-align: center; position: relative; box-shadow: 0 10px 35px rgba(0,0,0,0.35); animation: popupFade 0.35s ease; } .notice-popup h3 { margin: 0 0 12px; font-size: 20px; color: #d32f2f; } .notice-popup p { font-size: 14px; color: #333; margin-bottom: 18px; line-height: 1.5; font-weight: 600; } .notice-highlight { background: #fff3e0; border-left: 4px solid #ff9800; padding: 10px; margin-bottom: 16px; border-radius: 4px; font-size: 13.5px; color: #222; } .refund-link { font-size: 13px; margin-top: -10px; margin-bottom: 12px; } .refund-link a { color: #1976d2; text-decoration: none; font-weight: bold; } .refund-link a:hover { text-decoration: underline; } .support-info { margin-top: 12px; } .support-btn { display: inline-block; margin-top: 8px; padding: 10px 18px; background: #1976d2; color: #fff; border-radius: 5px; font-size: 13.5px; font-weight: bold; text-decoration: none; transition: 0.3s; } .support-btn:hover { background: #0d47a1; } .notice-popup .close-btn { position: absolute; top: 10px; right: 14px; border: none; background: none; font-size: 20px; cursor: pointer; color: #555; } .notice-popup .ok-btn { margin-top: 14px; padding: 10px 22px; background: #ff9800; border: none; color: #000; border-radius: 5px; cursor: pointer; font-size: 14px; font-weight: bold; } .notice-popup .ok-btn:hover { background: #f57c00; } @keyframes popupFade { from { transform: scale(0.88); opacity: 0; } to { transform: scale(1); opacity: 1; } } ✖ ⚠️ Caution Notice Digital Source Code Only • No Physical Product • No Refund No refund will be given after purchase. Only refund can be possible after checking your system thoroughly. Contact me under 7 days, if any issue persist. Nothing will be entertained after this. 👉 See Refund Policy I Understand 📩 Contact Support (info@circuitdiagrams.in) function closeNotice() { document.getElementById(“productNoticeOverlay”).style.display = “none”; } ⚡ 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. Video Tutorial