Home Automation System Using Arduino and HC-05 Bluetooth Module




About: Hey All.In Love With Micro Controllers.Still A Student ;D Want to Learn More!

Hey Guys How You all doing!

Today I am Here With My Second Arduino Instructable.

It is A Bluetooth Controlled Home Automation System.You Can Conrol Your Home Appliances Just From Your Smartphone.All the things Works Perfect ! Also I Designed The App..Please Have a Look At it. I wanted to have the information I learned in one place, and easy to Understand.Comments and suggestions are welcome and appreciated as I'm still trying to learn all this stuff. Hope You All Like It :)

Let's Start!!

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Step 1: What We Need

1.Arduino UNO.

2.HC-05 Bluetooth Module.

3.4 Relay Module.

4.Jumper Wires.

Step 2: Summing Up the Circuit

Wire Up The Circuit According To the schematics.

Just Follow One By One Wire And You Will Do It Perfectly.

For Bluetooth Module:-

1)VCC => 3.3V

2)GND => GND

3)Rx => Tx

4)Tx => Rx

For Relay Module:-

1)VCC => 5V

2)GND => GND

3)IN1 => Pin 4

4)IN2 => Pin 5

5)IN3 => Pin 6

6)IN4 => Pin 7

Step 3: Uploading the Code

Upload The Code To Arduino.

Remember To Disconnect The VCC Pin Of HC-05 Before Uploading Code.

Step 4: Downloading the APP

The App is for Android In APK Format.

Download It And Enjoy!

Step 5: Get Set Go

Have A Look At The Video!


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    7 Discussions

    Rajpreet kaur

    Question 5 months ago on Introduction

    I had Done all the Connections but the Connections after Pairing the Connections is Not eatablishing Why


    Question 6 months ago on Step 4

    I have the problem that app after installing its informing that its stopped working. How can I avoid this probelm to continue my project


    Question 1 year ago on Introduction

    how can you make the bluetooth app so that it correspond to your arduino code so that you can control the appliances perfectly


    Question 1 year ago on Step 4

    App is not working means stoped while using


    1 year ago on Step 5

    I have faced a problem on the app

    It says
    Unfortunately the apps has stupped


    Question 1 year ago on Step 3

    Problem occurs during upload the code to the arduino