HC-05 Bluetooth

VCC – 3.3V
GND – GND
TXD – D12
RXD – D11
KEY – D13
LED –

That’s it – Then you can connect to the bluetooth you desire.  After you pair, the code is 1234 which may be changed by the AT commands.

http://geekinc.ca/using-screen-as-a-serial-terminal-on-mac-os-x/

http://www.instructables.com/id/Arduino-AND-Bluetooth-HC-05-Connecting-easily/?ALLSTEPS

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