Yes, Arduino pairing is supposed to be one to one. What if there is another
identical HC-05 in the mix? During the pairing process, why wouldnt the master
pair with both HCs simultaneously since the master cant tell one from the other
and bluetooth is omnidirectional? Would one HC get left out? Wouldnt the master
"think" it is pairing with just one HC if both HCs (slaves) were identical in every way?