The Bluetooth module wants 3.3v logic levels so that is taken into account. The image above shows a buffer chip doing the conversion, but the Fritzing schematic on the post uses a voltage divider.

One failing of the HC-05 modules for use with Arduino is that one of the coolest things you could want to do would be to upload your sketches over BT, but the HC-05 (and 6, 10,11) don’t have a ...

Overall, Arduino Bluetooth Controller is a usable app, but it’s not the best option on this list. Arduino Bluetooth Controller by Giumig Apps. Giumig’s Arduino Bluetooth Controller features some of ...