Thank you for the UUID info. That answers my question completely (sad to say)! I'll have
to go back to NRF24s, unless there is a better/another simple hardware solution.
NRF24s are complete overkill for me. All I want is for an Arduino contained in a linear (1-D)
network of Arduinos to broadcast out a 2-byte response when that Arduino receives a change
of state thru one single digital input...like a sensor. All the remaining network of Arduinos will
also receive this 2-byte broadcast and update their output control responses accordingly. The
control code for each is unique and relatively complicated (at least for me).
Many Arduinos will do nothing. In general, only adjacent Arduinos (along the linear path) will
have interest in what the broadcasting Arduino sends out. No Arduino will have to broadcast a
2-byte change of state because of the broadcast info they just received. The time interval between
most any broadcast from any Arduino is measured in seconds...10 secs or more much of the time.
Hope this makes some sense. The code to assemble this sort of network using bluetooth looked
fairly simple (if my hope about multiple pairings was correct), but it appears that wont be possible
because of UUID. The code for NRF24s is more complicated, but doable. Setting up the hardware
is straight forward.
Im hoping Im missing a better alternative to NRF24s.
Thank you all for your helpful inputs.