Smart Energy Meter System – Readymade ESP32 Project

Description

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 [email protected].
• 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 [email protected]. 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.