Web Integrated Smart Energy Meter

Web Integrated Smart Energy Meter is an IoT-based system designed to monitor electrical parameters in real-time. It measures voltage, current, power, and energy consumption, displaying the data locally on an LCD and remotely via the Blynk IoT app.

Project Description

This project eliminates the need for manual meter reading by providing digital, real-time feedback.

• Real-time Monitoring: Measures AC Voltage (V), Current (A), and Power (W).
• Remote Access: Syncs live data to the Blynk mobile app over Wi-Fi.
• Cost Estimation: Automatically calculates electricity costs based on energy usage (set at 8.5 per unit).
• Data Persistence: Saves total energy readings to EEPROM memory so data is not lost during power cuts.

Components Used

• Microcontroller: ESP32 (Wi-Fi + Bluetooth).
• Voltage Sensor: ZMPT101B.
• Current Sensor: ACS712.
• Display: 16x2 LCD.
• Software: Arduino IDE & Blynk IoT Platform.

Pin Connections

Connect the components to the ESP32 as defined in the source code:

Component	ESP32 GPIO Pin
Voltage Sensor (ZMPT101B)	GPIO 35
Current Sensor (ACS712)	GPIO 34
LCD RS	GPIO 21
LCD EN	GPIO 22
LCD D4	GPIO 4
LCD D5	GPIO 5
LCD D6	GPIO 18
LCD D7	GPIO 19

Software & Libraries

The code is written in C++ using the Arduino IDE. You will need the following libraries:

1. BlynkSimpleEsp32.h
2. EmonLib.h (Energy Monitor Library)
3. LiquidCrystal.h
4. EEPROM.h

How to Run

1. Connect the hardware according to the pin connections table.
2. Open the .ino file in Arduino IDE.
3. Install the required libraries.
4. Update the Wi-Fi SSID, Password, and Blynk Auth Token in the code.
5. Upload the code to your ESP32 board.