An Arduino mini pro provides the ... you’ll have to remove it before uploading new code. If you need help reprogramming the HC-05 Bluetooth module, we’ve covered that before.

The Arduino processes the data and then transmits it to a smart phone via a Bluetooth module. The whole circuit ... He’s also made the Arduino code available in case any one wants to copy ...

Then, an Arduino board might be ... protocols like Wi-Fi and Bluetooth, though. However, additional components -- a Wi-Fi shield and a Bluetooth module -- are required. The R4 WiFi is already ...