Home Automation Using Arduino Uno

Salman Faris
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Introduction

Ever wanted to make your home automated? Wanted to control the lights, fan and other appliances from your smartphone? Or wanted a tutorial about connected devices and getting started with it? Android Home Automation will show you how to make your home automated using an Android smartphone. This requires you to have no experience of Android programming at all, as a free application is included for you to develop. Using this Android application you will be able to control your lights, air conditioning, door locks, etc all from your smartphone. This system uses Bluetooth to connect with your device and control the various appliances in your home. Have fun with this tutorial!

Step 1: Tools and Materials

Hardware

Arduino / Arduino Clone
A 5v TTL -UART Bluetooth module like JY-MCU BT_BOARD (Cheaper) or Bluesmirf Gold/Silver.
Five 5V SPDT relays like: 5V relayPrototype board or breadboard.
Connecting wires.

Software

Arduino IDE
DIY smart home Android App

Step 2: Hardware Assembly

Step 3: Schematics

Bluetooth TX pin to Arduino RX pin.
Bluetooth RX pin to Arduino TX pin
VCC pin to 5v GND to GND Arduino
Relay IN1 pin to Arduino D2 (Digital Pin 2)

Step 4: Programming the Arduino

Arduino

If you are new to the Arduino, it is a small board, fully assembled with a AVR microcontroller. It is well suited for hacking and interacting with your environment. Many things that are hard with microcontrollers are rather easy with Arduino. Some of the advantages:

No need for a separate programming device (programmer).
Comes with an integrated development environment (IDE) runs on any platform, Windows, Mac, Linux. easy connection to your PC with USB hardware is an open source (but the name Arduino is not) has a great community More information can be found at the official Arduino website.

Steps

Connect your Arduino to Computer
Copy-paste the Home_auto.ino file or open with the Arduino IDE
Upload the code to Arduino

Step 5: Install the App

Connect Arduino to 9v battery or computer
Install the App in your Phone
Run the application
Allow the BT permissions,
Type Your BT Module name (Normally HC-05)
Password = 1234
Pair ok

Step 6: Control Your home Using Your Phone

In this project, I only used One Relay and therefore we can control only one device, also we can add more relay modules and control all of your home.

Note: Be Careful while working with relay since its 240V AC.

The mobile app and Arduino code will be in the Zip file attached.