Arduino to arduino via bluetooth?
Two of the arduino's will be powered off most of the time. If they power up I need it to link to the other one.
So the two will need to power up, link to the one, and start sending signal.
The one is just going to power up a light and maybe later also report to the web.
The two are just signal generators to let the one know to turn the light on.
If I can't link three, I will buy 4 and just make two pairs.
Thanks for any answers.