Using Home Automation one can remotely control any number of devices through a smartphone. In this project we will be designing a PCB for the Home Automation system using HC-05 BT module with Atmega328p.

In modern day’s everyone using smartphones and the internet. Therefore, every smartphone has Bluetooth System. In this project, we will design a simple Atmega328p Bluetooth Control Home Automation using the HC-05 Bluetooth module, which is used to switch ON or OFF different electrical appliances remotely. Home Automation system can make our life easy and secure. Here we will control 4 different home appliances using Smartphone App through Bluetooth communication. Project Concept of Home Automation using Atmega328p and Bluetooth HC-05 Module.

The key components of the project are Atmega328p, HC-05 Bluetooth module, 4 Channel Relay Module and “Bluetooth Controller” app. Where Arduino is the main microcontroller of the project that’s controlled all other components. The HC-05 Bluetooth module is used to receive data from a smartphone. The relay module is used to control AC devices. Also, we need to download and install the Bluetooth Controller App on our Smartphone, Which is sending data to the HC-05 Bluetooth Module.

Here we will send data from the smartphone using the Bluetooth controller App, then the Bluetooth module receives this data and pass this data to the Atmega328p. Now, Atmega328p is decoding this data, and send commands to the relay module to control the devices.