Smart Home Automation Using Arduino

About the project

The project describes how to control home appliances by easily sending data from an Android smartphone to Arduino.

Project info

Difficulty: Moderate

Platforms: Arduino

Estimated time: 5 days

License: GNU General Public License, version 3 or later (GPL3+)

Items used in this project

Hardware components

Tiny Breadboard Tiny Breadboard x 1
Standard Lcd 16x2 White On Blue Standard Lcd 16x2 White On Blue x 1
Arduino Mega 2560 R3 Arduino Mega 2560 R3 x 1
HC-05 Bluetooth Module HC-05 Bluetooth Module x 1
L293D L293D x 1
Relay 6V Relay 6V x 2
LED Light Bulb LED Light Bulb x 2
Android device Android device x 1

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Software apps and online services

Arduino IDE Arduino IDE
Bluetooth terminal App Bluetooth terminal App


About Project:

To start with home automation with a smartphone-controlled, we need to download the Bluetooth Terminal App and install it on the Android smartphone and then join it with the HC05 module. Just pair this as we generally paired two Bluetooth devices.

Now we can easily share data to the HC05 module through Android Phone. HC05 module is attached to Arduino Mega which will receive data that was sent by Terminal App via Smartphone. Here we have used LCD 16X2 to display the status (ON/OFF) of home appliances. The adapter is utilized to power the Arduino as well as the circuit. L293D IC is utilized to run two Relay which is directly attached to two Bulbs.

On each sending data by smartphone, Arduino verifies for the character sent and puts relevant pins high or low as per the Code. These pins handle the relays which in turn handle the home Appliances.

  • If we give ‘a’ via Bluetooth Terminal App then Bulb1 will be On and Bulb2 will be off.
  • If we give ‘b’ via Bluetooth Terminal App then Bulb2 will be On and Bulb1 will be off.

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