Bluetooth is among the most widely accepted ways for two devices to communicate with each other. Every phone, tablet, and laptop comes with Bluetooth built in, as do several peripherals. So with a little do-it-yourself (DIY) tinkering, you can do some wonderful things with this technology.
For any project in this list, you will need to know the basics of DIY electronics and have the necessary tools at hand. Some projects require specialized tools, as noted. And of course, always remember to take all the necessary safety precautions before you begin.
The basic project you need to master is setting up Bluetooth on an Arduino microcontroller, and making it talk to another Arduino board wirelessly. Martyn Curry has an excellent step-by-step guide for this, connecting two Arduino boards as master and slave.
Naturally, you’ll need two Arduino boards and two Bluetooth receiver modules for this. To begin, start with his basic tutorial where he teaches you how to remote control an LED light on the slave Arduino via the master Arduino.
Then move on to the more advanced project,