Overview
Things
Story

Smart Energy Meter with Home Automation
Key Components
Features and Benefits
Implementation

Published July 12, 2024 © CERN-OHL

Smart Energy Meter with Home automation

A Smart Energy Meter with Home Automation system integrates real-time energy monitoring with automated control of household devices. It trac

IntermediateFull instructions providedOver 2 days757

Things used in this project

Hardware components

SCT-013

AC Single Phase Voltage Sensor (ZMPT101B)

NodeMCU ESP8266 Breakout Board

Arduino UNO

connecting wires

5 mm LED: Red

Software apps and online services

Arduino IDE

web brows

Story

Smart Energy Meter with Home Automation

A Smart Energy Meter with Home Automation system integrates real-time energy monitoring with automated control of household devices, enhancing energy efficiency and convenience.

Key Components

Current Sensor (SCT-013):

Description: A non-invasive sensor that measures AC current passing through a conductor without direct electrical contact.
Function: Provides accurate real-time current measurement, essential for monitoring power consumption of individual appliances.
Current Sensor (SCT-013):Description: A non-invasive sensor that measures AC current passing through a conductor without direct electrical contact.Function: Provides accurate real-time current measurement, essential for monitoring power consumption of individual appliances.

AC Single Phase Voltage Sensor (ZMPT101B):

Description: A compact sensor designed to measure AC voltage in single-phase systems.
Function: Ensures precise voltage readings, allowing for accurate calculation of power usage when combined with current measurements.
AC Single Phase Voltage Sensor (ZMPT101B):Description: A compact sensor designed to measure AC voltage in single-phase systems.Function: Ensures precise voltage readings, allowing for accurate calculation of power usage when combined with current measurements.

Arduino:

Description: A versatile microcontroller platform used for developing electronic projects.
Function: Collects data from current and voltage sensors, processes it to calculate power consumption, and sends it to the NodeMCU for further processing and display.
Arduino:Description: A versatile microcontroller platform used for developing electronic projects.Function: Collects data from current and voltage sensors, processes it to calculate power consumption, and sends it to the NodeMCU for further processing and display.

NodeMCU:

Description: An open-source IoT platform based on the ESP8266 Wi-Fi module.
Function: Receives processed data from the Arduino, connects to Wi-Fi, and uploads energy usage data to a cloud server or a local web dashboard for real-time monitoring and control.
NodeMCU:Description: An open-source IoT platform based on the ESP8266 Wi-Fi module.Function: Receives processed data from the Arduino, connects to Wi-Fi, and uploads energy usage data to a cloud server or a local web dashboard for real-time monitoring and control.

Features and Benefits

Real-time Energy Monitoring:

Tracks overall and individual appliance energy usage, provides cost estimates, and analyzes historical data.
Real-time Energy Monitoring:Tracks overall and individual appliance energy usage, provides cost estimates, and analyzes historical data.

Automated Control:

Allows scheduling, remote control via a smartphone app, and voice commands through integration with virtual assistants.
Automated Control:Allows scheduling, remote control via a smartphone app, and voice commands through integration with virtual assistants.

Energy Saving:

Includes smart thermostat integration, load shedding, and energy efficiency recommendations.
Energy Saving:Includes smart thermostat integration, load shedding, and energy efficiency recommendations.

Safety and Security:

Sends alerts for abnormal usage and potential faults, allows setting consumption limits, and integrates with home security systems.
Safety and Security:Sends alerts for abnormal usage and potential faults, allows setting consumption limits, and integrates with home security systems.

Implementation

Installation:

Install SCT-013 current sensors on the main power lines and ZMPT101B voltage sensors in the circuit.
Installation:Install SCT-013 current sensors on the main power lines and ZMPT101B voltage sensors in the circuit.

Integration:

Connect sensors to the Arduino, which processes the data and transmits it to the NodeMCU.
Integration:Connect sensors to the Arduino, which processes the data and transmits it to the NodeMCU.

Configuration:

Set up the NodeMCU to connect to a Wi-Fi network and configure the mobile app or web interface.
Configuration:Set up the NodeMCU to connect to a Wi-Fi network and configure the mobile app or web interface.

Monitoring and Optimization:

Continuously monitor energy usage via the app or dashboard, adjusting settings to optimize consumption.
Monitoring and Optimization:Continuously monitor energy usage via the app or dashboard, adjusting settings to optimize consumption.

This system combines precise energy monitoring with smart home automation, offering cost savings, environmental benefits, and enhanced convenience.

1 / 4

web page of control pannel

Code

Arduino code

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include "EmonLib.h"
#include <SoftwareSerial.h>

EnergyMonitor emon;

#define vCalibration 83.3
#define currCalibration 0.50
SoftwareSerial mySerial(10, 11);

float kWh = 0;
unsigned long lastmillis = millis();

LiquidCrystal_I2C lcd(0x27, 16, 2); // Address 0x27, 16 columns, 2 rows

void myTimerEvent()
{
  emon.calcVI(20, 2000);
  kWh = kWh + emon.apparentPower * (millis() - lastmillis) / 3600000000.0;
  yield();
  Serial.print("Vrms: ");
  Serial.print(emon.Vrms, 2);
  Serial.print("V");

  Serial.print("\tIrms: ");
  Serial.print(emon.Irms, 4);
  Serial.print("A");

  Serial.print("\tPower: ");
  Serial.print(emon.apparentPower, 4);
  Serial.print("W");

  Serial.print("\tkWh: ");
  Serial.print(kWh, 5);
  Serial.println("kWh");

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Vrms:");
  lcd.print(emon.Vrms, 2);
  lcd.print("V");
  lcd.setCursor(0, 1);
  lcd.print("Irms:");
  lcd.print(emon.Irms, 4);
  lcd.print("A");
  delay(2500);

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Power:");
  lcd.print(emon.apparentPower, 4);
  lcd.print("W");
  lcd.setCursor(0, 1);
  lcd.print("kWh:");
  lcd.print(kWh, 4);
  lcd.print("W");
  delay(2500);

  lastmillis = millis();
}

void setup()
{
  Serial.begin(9600);

  lcd.init();
  lcd.backlight();

  emon.voltage(A0, vCalibration, 1.7);
  emon.current(0, currCalibration);

  lcd.setCursor(3, 0);
  lcd.print("IoT Energy");
  lcd.setCursor(5, 1);
  lcd.print("Meter");
  delay(3000);
  lcd.clear();
}

void loop()
{
  myTimerEvent();
  delay(2000);
}