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.

An HC-05 Bluetooth module is connected to an Attiny85, with some transistors to control a 5V power output. The Arduino takes care of a bluetooth connection and uses a serial input to control the ...

Powered by an Arduino Nano the robot is linked to a smartphone running a custom application thanks to a HC-05 Bluetooth module. “I like very much to see robots walk like animals.