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Arduino Communication with an Android App via Bluetooth

With the arrival of the IoT and the need for control, devices now need to do more than perform the basic functions for which they are built, they need to be capable of communicating with other devices like a mobile phone among others. There are different communication systems which can be adapted for communication between devices, they include systems like WiFi, RF, Bluetooth among several others. Our focus will be on communication over Bluetooth.

Today we will be building an Arduino based project which communicates with an app running on a smartphone (Android) via Bluetooth.

For simplicity, the goal of the project is to switch a LED connected to the Arduino using the mobile app. We will be using the HC06 Bluetooth module as the major ingredient in this tutorial.

The HC06 Bluetooth Module is a slave only version of the HC05 Bluetooth module. It has 4 pins and communicates with a microcontroller via serial interface.”

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