Connect 2 Arduino UNOs via Bluetooth? (HC-05 and HC-06)?
Have a look at this for how to pair them http://www.martyncurrey.com/connecting-2-arduinos-by-bluetooth-using-a-hc-05-and-a-hc-06-pair-bind-and-link basically you need to use the AT mode.
As far as I know you will be using the serial connection to communicate, but if you are using UNOs debugging becomes a bit more difficult, because you can't use serial for debugging.