Premium IoT Smart Energy Meter Source Code (PZEM-004T, Blynk)

Description

Whether you are a DIY electronics enthusiast, an engineering student, or a smart home builder, this complete, ready-to-flash ESP32 source code provides everything you need to build a professional-grade energy monitor. Powered by the ESP32 microcontroller and the highly accurate PZEM-004T sensor, this system tracks your electricity usage in real-time and calculates your running costs automatically.

View your live data directly on the physical I2C LCD screen, or monitor your home’s energy consumption from anywhere in the world using the Blynk IoT app. We’ve handled the complex coding—including EEPROM memory saving, auto-scrolling display logic, and cloud syncing—so you can focus on building your project.

🌟 Key Features Included in the Code:

• Real-Time Data Extraction: Accurately reads Voltage (V), Current (A), Power (W), Energy (kWh), Frequency (Hz), and Power Factor (PF) using the PZEM-004T sensor.
• Automatic Cost Calculation: Automatically converts your kWh usage into your local currency (default set to PHP, easily adjustable in the code).
• Non-Volatile Memory (EEPROM Protection): Never lose your data during a power outage. The code automatically saves energy and cost data to the ESP32’s flash memory every 30 seconds.
• Smart LCD Interface: Features a 4-page rotating display on a 16×2 I2C LCD. Pages automatically scroll every 3 seconds, or users can manually cycle through pages using a physical push button.
• Global Cloud Monitoring: Fully integrated with the new Blynk IoT platform. Syncs all 7 data points to the cloud every second for real-time mobile dashboard viewing.
• Dual-Reset Functionality: Safely reset your energy accumulation and cost back to zero either locally (by holding the physical button for 3 seconds) or remotely via a virtual button in the Blynk app.
• Automated Push Notifications: Configured to send a periodic energy and cost report directly to your smartphone via Blynk Events.
• Failsafe Filtering: Includes logic to filter out phantom sensor noise when voltage drops below 30V.

🛠️ Hardware Requirements

To use this code, you will need the following components:

• ESP32 Development Board
• PZEM-004T (v3.0) UART Communication Module
• 16×2 I2C Liquid Crystal Display (LCD)
• 1kΩ Resistor (Crucial for logic level shifting between PZEM and ESP32)
• Standard Push Button
• Veroboard or Breadboard
• Male to Male and Male to Female Jumper Wires
• 5V Power Supply
• AC 1.0 sqmm Wire
• AC Socket for Output Load

📦 What You Get with Your Purchase?

• Instant digital download of the .ino Arduino source code file.
• A list of all required libraries (PZEM004Tv30, ArduinoJson v7, BlynkSimpleEsp32, etc.) for a frictionless compilation.
• Circuit Schematic
• Project Report (PDF)
• Presentation PPT
• Wiring Diagram Guide (PDF)
• Blynk Setup Guide (PDF)

Note: This is a digital product containing software source code only. No physical hardware is included.