Smart Home Automation System using Ayantrik Lab

@VijayashekarCApril 13, 20266 Min Read

Smart Home Automation System using Ayantrik Lab

TL;DR: In this project, we build a Smart Home Automation System using Arduino and multiple sensors in Ayantrik Lab. The system monitors gas, fire, light, and rain conditions, displays real-time status on an LCD, and triggers alerts using a buzzer.

The Problem / Why This Matters

Modern homes require smart monitoring systems to ensure:

  • Safety
  • Energy efficiency
  • Automation
  • Real-time alerts

Traditional homes lack automated detection for:

  • Gas leaks
  • Fire hazards
  • Lighting conditions
  • Weather changes

This project is available here Try here

What is a Smart Home Automation System?

A Smart Home system uses sensors and controllers to:

  • Monitor environmental conditions
  • Automatically respond to changes
  • Alert users in dangerous situations

In this project:

  • Sensors → Detect conditions
  • Arduino → Processes data
  • LCD → Displays status
  • Buzzer → Alerts user

Features of This Project

  • Fire detection using flame sensor
  • Gas leakage detection using MQ-2 sensor
  • Rain detection
  • Light detection using LDR
  • Real-time display on LCD
  • Alert system using buzzer

Prerequisites

Components used:

  • Arduino Uno
  • MQ-2 Gas Sensor
  • Flame Sensor
  • LDR Sensor
  • Rain Sensor
  • LCD 16x2 (I2C)
  • Buzzer

All components are available in Ayantrik Lab.

Steps to Create the Project in Ayantrik Lab

1. Open a New Project

Open Ayantrik Lab and create a new project.

Create New ProjectCreate New Project

2. Add Components

ToolbarToolbar

Click Add Components and add:

  • Arduino Uno
  • MQ-2 Gas Sensor
  • Flame Sensor
  • LDR Sensor
  • Rain Sensor
  • LCD (16x2 I2C)
  • Buzzer

Arrange them properly on the canvas.

3. Make the Circuit Connections

smart homesmart home

Gas Sensor (MQ-2)

  • VCC → 5V
  • GND → GND
  • AO → A0

Flame Sensor

  • VCC → 5V
  • GND → GND
  • DO → D2

Rain Sensor

  • VCC → 5V
  • GND → GND
  • DO → D3

LDR Sensor

  • VCC → 5V
  • GND → GND
  • AO → A1

LCD (I2C)

  • VCC → 5V
  • GND → GND
  • SDA → A4
  • SCL → A5

Buzzer

  • Positive → D4
  • Negative → GND

Code

Upload the following code:

cpp
#include <LiquidCrystal.h>
#include <Wire.h>
#include <MPU6050.h>
#define minval -5
#define maxval 3
MPU6050 mpu;
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
void setup()
{   lcd.begin(16, 2);
    Serial.begin(115200);
    pinMode(7,OUTPUT);
    pinMode(8,OUTPUT);
    lcd.print("   EarthQuake ");
    lcd.setCursor(0, 1);
    lcd.print("   Detector");
    delay (2000);
    lcd.clear();
  Serial.println("Initialize MPU6050");
  while(!mpu.begin(MPU6050_SCALE_2000DPS, MPU6050_RANGE_2G))
  { Serial.println("Could not find a valid MPU6050 sensor, check wiring!");
    delay(500);}
  mpu.setThreshold(3); 
  checkSettings();
}

void checkSettings()
{
  Serial.println();
  Serial.print(" * Sleep Mode:        ");
  Serial.println(mpu.getSleepEnabled() ? "Enabled" : "Disabled");
  Serial.print(" * Clock Source:      ");
  switch(mpu.getClockSource())
  {case MPU6050_CLOCK_KEEP_RESET:     Serial.println("Stops the clock and keeps the timing generator in reset"); break;
    case MPU6050_CLOCK_EXTERNAL_19MHZ: Serial.println("PLL with external 19.2MHz reference"); break;
    case MPU6050_CLOCK_EXTERNAL_32KHZ: Serial.println("PLL with external 32.768kHz reference"); break;
    case MPU6050_CLOCK_PLL_ZGYRO:      Serial.println("PLL with Z axis gyroscope reference"); break;
    case MPU6050_CLOCK_PLL_YGYRO:      Serial.println("PLL with Y axis gyroscope reference"); break;
    case MPU6050_CLOCK_PLL_XGYRO:      Serial.println("PLL with X axis gyroscope reference"); break;
    case MPU6050_CLOCK_INTERNAL_8MHZ:  Serial.println("Internal 8MHz oscillator"); break;
  }
  Serial.print(" * Gyroscope:         ");
  switch(mpu.getScale())
  {case MPU6050_SCALE_2000DPS:        Serial.println("2000 dps"); break;
    case MPU6050_SCALE_1000DPS:        Serial.println("1000 dps"); break;
    case MPU6050_SCALE_500DPS:         Serial.println("500 dps"); break;
    case MPU6050_SCALE_250DPS:         Serial.println("250 dps"); break:}
  Serial.print(" * Gyroscope offsets: ");
  Serial.print(mpu.getGyroOffsetX());
  Serial.print(" / ");
  Serial.print(mpu.getGyroOffsetY());
  Serial.print(" / ");
  Serial.println(mpu.getGyroOffsetZ());
  Serial.println();}
void loop()
{   Vector rawGyro = mpu.readRawGyro();
  Vector normGyro = mpu.readNormalizeGyro();
  Serial.print(" Xraw = ");
  Serial.print(rawGyro.XAxis);
  Serial.print(" Yraw = ");
  Serial.print(rawGyro.YAxis);
  Serial.print(" Zraw = ");
  Serial.println(rawGyro.ZAxis); 
if(normGyro.XAxis > maxval || normGyro.XAxis < minval && normGyro.YAxis > maxval || normGyro.YAxis  < minval && normGyro.ZAxis > maxval || normGyro.ZAxis  < minval)
{ digitalWrite(7,HIGH);
  digitalWrite(8,HIGH);
  delay(300);
  digitalWrite(7,HIGH);
  digitalWrite(8,HIGH);
  delay(300);
  lcd.clear();
  lcd.print("***EarthQuake***");
  delay (1000);
  lcd.clear();}

 else{digitalWrite(7,LOW);
 digitalWrite(8,LOW);}
  Serial.print(" Xnorm = ");
  Serial.print(normGyro.XAxis);
  Serial.print(" Ynorm = ");
  Serial.print(normGyro.YAxis);
  Serial.print(" Znorm = ");
  Serial.println(normGyro.ZAxis);
  delay(10);}

How the Logic Works

The system continuously reads data from all connected sensors and makes decisions based on the values.

1. Gas Detection (MQ-2 Sensor)

The gas sensor monitors air quality.

  • If gas level increases beyond a safe threshold
    → Buzzer turns ON
    → Warning is displayed

This helps detect gas leaks early.

2. Flame Detection

The flame sensor detects fire.

  • If flame is detected
    → Immediate alert is triggered
    → Buzzer activates

This is critical for fire safety.

3. Light Detection (LDR Sensor)

The LDR detects ambient light levels.

  • Bright → Day
  • Dark → Night

This can be used for:

  • Automatic lighting systems
  • Energy saving

4. Rain Detection

The rain sensor detects water presence.

  • Rain detected → Display updates
  • No rain → Normal state

Useful for:

  • Automatic window control
  • Outdoor system protection

5. LCD Display System

The LCD shows real-time information:

It updates dynamically based on sensor inputs.

6. Buzzer Alert System

The buzzer acts as a warning system.

It turns ON when:

  • Gas is detected
  • Fire is detected

This ensures immediate user attention.

Expected Behavior

When you run the simulation:

  • LCD displays live environmental data
  • Sensors continuously monitor conditions
  • Buzzer activates during unsafe conditions
  • System responds in real-time

Built-in Debugging in Ayantrik Lab

Ayantrik Lab provides a built-in debugging feature that helps debug both:

  • Circuit connections
  • Code logic

It can detect:

  • Wrong wiring
  • Missing connections
  • Incorrect pin mapping
  • Code errors

DebuggingDebugging This makes building complex systems easier and faster.

Conclusion

In this project, we built a Smart Home Automation System using Arduino in Ayantrik Lab.

You learned:

  • Multi-sensor integration
  • Real-time monitoring systems
  • Alert mechanisms using buzzer
  • Displaying live data using LCD
  • Designing smart automation logic

Try Next

You can enhance this project by:

  • Adding IoT alerts (mobile notifications)
  • Automating appliances (lights, fans)
  • Integrating temperature & humidity sensors
  • Adding voice control

Now you're building real-world smart systems, not just circuits.

Happy learning with Ayantrik Lab.!

Continue Reading

How to Teach Electronics Remotely — A Guide for Indian Teachers

How to Teach Electronics Remotely — A Guide for Indian Teachers

remote teaching
June 3, 20267 Min

By Nalini Vijayakumar

Remote electronics teaching doesn't mean a watered-down curriculum. Discover how Indian teachers are using browser-based virtual labs to run richer experiments, eliminate hardware failures, and assess students more rigorously — without a single physical component.

Read Article