Controlled by a smartphone app, a cheap Arduino board with an HC-05 Bluetooth module ran the show. However, when this was all assembled, the car was too heavy to climb walls or stick to the ceiling.

It’s hard to imagine an easier way to set up communications between an Android device and an Arduino using Bluetooth than by following this guide. In the center of the breadboard you can see … ...

The wearable smart glasses are controlled by an Arduino Nano Every microcontroller combined with an HC-05 Bluetooth module, that enable the glasses to connect to the mobile app, while a small LiPo ...