Bluetooth based home automation
In this section, we will look at a project that can be used in home automation, to control the devices in a house, using a Bluetooth module to communicate, and a relay module and the integration of the hardware as software tools.
The following diagram shows how to connect the relay module and the HC05 Bluetooth module to the Arduino board:
![](https://static.packt-cdn.com/products/9781785888564/graphics/B05170_09_10.jpg)