A FT-232 USB to serial board is used to program the Arduino. A standard Bluetooth module has to have HID firmware installed. [Dastardly] makes a homemade daughterboard–er, shield–to connect ...

How, then, do you get your phone to send specific serial signals to your Bluetooth module, receiving feedback as needed? We combed through the Google Play store to figure out which are worth ...

There’s his DIY LED display controlled by an Arduino UNO. To have some text or picture for the display, he’s wired the output of a Bluetooth speaker directly to the Arduino, and sends it ...