Smart Energy Meter System – Readymade ESP32 Project

The Smart Energy Meter System is a complete ready-to-use IoT-based electrical monitoring project designed using an ESP32 microcontroller. It allows real-time measurement and monitoring of electrical parameters such as voltage, current, power, energy consumption, and cost (₹). This system integrates both hardware display (I2C LCD) and remote monitoring via Blynk app, making it ideal for learning, demonstration, and small-scale practical applications. ⚙️ Key Features 📊 Real-time measurement of: Voltage (V) Current (A) Power (W) Energy Consumption (kWh) Cost Calculation (₹ based on unit rate) 📱 WiFi-based monitoring via Blynk 📟 On-device display using I2C LCD 🔌 Supports AC load monitoring ⚡ Compact double-sided PCB design 🔄 Continuous live data updates ⚠️ Low Power Measurement Accuracy (Important Notice) 🔻 Limited Accuracy at Low Power Levels The ACS712 and ZMPT101B are not optimized for very low current and low power measurements. 📉 Why This Happens ACS712 has inherent noise (especially ±5A version), which makes small current readings unstable ZMPT101B requires precise calibration and is sensitive to external noise ADC resolution of ESP32 further limits precision at low signal levels ⚡ Practical Impact Loads below ~5–10W may show fluctuating or inaccurate readings Small devices like phone chargers, LED bulbs, routers may not be measured precisely Best accuracy is achieved at moderate to higher loads (above ~20–30W) 🎯 Best Use Case Fans, heaters, irons, bulbs (higher wattage), and other medium-to-high power appliances 📦 Package Includes ESP32 Development Board I2C LCD Display (16×2) ZMPT101B Voltage Sensor ACS712 Current Sensor Module Double-Sided PCB Board Jumper Wires AC Socket for Load Connection AC Wires AC Plug 📐 Measurement Range & Specifications Voltage Range: 100V – 260V AC (safe typical household range) Current Range: Depends on ACS712 variant (5A / 20A / 30A) Power Calculation: Up to ~5kW (depending on sensor limits) Energy Tracking: Continuous accumulation (kWh) Cost Calculation: Based on user-defined ₹/unit rate Connectivity: WiFi (2.4GHz via ESP32) 🎯 Suitable For 🎓 Engineering & Diploma Students (Final Year Projects) 🧪 Electronics & IoT Hobbyists 🏫 School Science Exhibitions 🔬 Educational Demonstrations & Lab Use 🏠 Basic Home Energy Monitoring (non-commercial use) ⚠️ Limitations (Important) ❌ Not certified for commercial or billing purposes ❌ Accuracy depends on calibration of sensors ❌ ACS712 is noisy at low current (less precise for small loads) ❌ ZMPT101B requires careful calibration for correct voltage reading ❌ No isolation for high-voltage sections (handle with caution) ❌ Not suitable for industrial 3-phase systems ❌ Limited accuracy compared to professional energy meters ❌ Requires stable WiFi for Blynk monitoring ❌ No built-in protection (overcurrent/short circuit) ❌ PCB and wiring require careful handling (DIY nature) 🔐 Safety Note This project works with high AC voltage (230V). Proper precautions must be taken. Recommended for users with basic electrical knowledge. 🚀 Why Buyers Love This Smart Energy Meter 💰 Affordable Alternative to Costly Smart Meters Get similar functionality at a fraction of the price. ⚡ Track Every Unit, Save Every Rupee Know exactly how much electricity you use and how much it costs in real-time—no more surprise bills. 📱 Monitor Your Power Anytime, Anywhere Stay connected to your energy usage from your phone using Blynk—even when you’re not at home. 🧠 Learn Practical IoT + Energy Monitoring Not just a product—it’s a hands-on learning system combining sensors, ESP32, and cloud monitoring. 🔌 Plug & Start (Minimal Setup Required) Pre-designed system with all essential components—save hours of building and debugging. 📊 5-in-1 Measurement System Voltage, Current, Power, Energy, and Cost—all in one compact device. 💡 Perfect for Projects & Demonstrations Impress your teachers, clients, or audience with a working real-time energy monitoring system. 🔄 Live LCD + Mobile Display View data instantly on the LCD or remotely via mobile—double convenience. ⚙️ Fully Customizable & Expandable Modify code, add relays, automation, or alerts—ideal for future upgrades. 🧪 Test Real Electrical Loads Safely (With Care) Designed to work with real AC loads for practical learning experience. Important Purchase & Setup Instructions Account Creation: Before purchasing this product, make sure to create an account on this website. Payment Process: After completing your purchase, do not press the back button. The payment system will automatically redirect you to the order page. If you face any payment-related issues, inform us at info@circuitdiagrams.in. Next Steps: After purchasing, our team will contact you soon regarding the shipment procedure. System Setup: Customers will need to provide their Blynk account ID and other required configuration details to our team at the time of setup. Shipping Information Delivery Area: This product is exclusively available for delivery Pan India. International Shipping: Not deliverable outside of India. Shipping Time: Customers need to give atleast 2 days for preparing the shipment after purchase. Terms & Conditions (Please Read Carefully) Cancellations: After the item has been shipped, no modifications or cancellations are possible. Returns: Once the product is delivered, no returns are accepted. Warranty Policy: This product carries no standard warranty. Support: Virtual support is only available for 1 month from the date of delivery. 7-Day Replacement Policy: If the system is not working upon arrival, you must inform us within 7 days of delivery by emailing info@circuitdiagrams.in. Make sure to record a full unboxing video without no edit and no cut. If any editing found, immediately replace procedure will terminate. We will replace the faulty components only after a thorough technical checkup confirms the defect. Post-7 Days: After the initial 7-day period, no complaints, replacements, or service requests will be entertained.