Advanced Smart Energy Meter Source Code with Web Dashboard & CSV Logging

Turn your ESP32 into a professional-grade, real-time smart energy monitor. This digital download provides the complete, ready-to-compile ESP32 source code for building an advanced WiFi-enabled energy meter. Designed specifically for the ESP32 microcontroller and the PZEM-004Tv30 sensor, this code does the heavy lifting for your DIY IoT power monitoring projects. It seamlessly tracks voltage, current, power, energy consumption, frequency, and power factor while providing a sleek web-based API and LCD interface. .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 period. 👉 See Refund Policy I Understand 📩 Contact Support (info@circuitdiagrams.in) function closeNotice() { document.getElementById(“productNoticeOverlay”).style.display = “none”; } Please Note: This is a strictly digital product containing the downloadable source code (.ino files). No physical hardware, sensors, or microcontrollers are included. Key Features Real-Time Data API: Generates dynamic JSON endpoints (/api/now) streaming live metrics like voltage, current, active power, energy, frequency and power factor directly to your browser or smart home system. Built-in Cost Calculator: Automatically calculates total energy costs and predicts monthly bills based on a customizable cost-per-kWh variable. Local CSV Data Logging: Uses SPIFFS memory to log energy data every 10 seconds. You can easily download your historical data (/energy.csv) directly from the web server. Smart Anomaly Detection: Programmed to flag system statuses including OVER VOLTAGE, UNDER VOLTAGE, OVER CURRENT, and MAINS OFF. WiFi Setup Portal: Integrated WiFiManager ensures you never have to hardcode your Wi-Fi credentials. Connect seamlessly via an auto-generated setup portal. I2C LCD Integration: Pre-configured logic for a 20×4 I2C Liquid Crystal Display, featuring automatic alternating pages to show all your power metrics without pressing a button. Over-The-Air (OTA) Updates: Update your firmware wirelessly without ever plugging the ESP32 back into your computer. Hardware Compatibility To utilize this source code, you will need to assemble the following hardware: ESP32 Development Board PZEM-004T v3.0 AC Energy Monitor Sensor 20×4 I2C LCD Display Required Arduino Libraries This project relies on several popular, open-source libraries. Ensure you have the following installed in your Arduino IDE: WiFi.h & WebServer.h (Built into ESP32 core) PZEM004Tv30.h ArduinoJson.h WiFiManager.h LiquidCrystal_I2C.h What You Get? Instant access to the complete, fully commented ESP32 source code. Clean, modular code structure organized into logical sections (Sensors, JSON Builders, Web Routes, Storage, and OTA). A perfect companion firmware for your custom PCB or breadboard projects. Complete source code compatible libraries. Complete Circuit Diagram. Build your ultimate home energy dashboard today with this powerful, plug-and-play source code!