An Arduino mini pro provides the brains. A FT-232 USB to serial board is used to program the Arduino. A standard Bluetooth module has to have HID firmware installed.

Skipping the Bluetooth in a portable Bluetooth speaker gives us a new platform for our noise maker hacks. Something small, fun, and easy to bring to our next hacker show-and-tell meetup!

Arduino Uno R4 WiFi comes with built-in Wi-Fi and Bluetooth capabilities, along with additional pins and a new, faster processor.