I have two arduinos operating in tandem. each with its own photocell and a buzzer to enunciate when a laser beam is broken. I can't get them to communicate. I just need the first device (call it "A") to tell the second device ("B") when its sensor is tripped. B then keeps track of when either device…

How to easily send data from one arduino to another?

system November 25, 2012, 1:25am 9

Scratching my head here. For avoidance of doubt, could you please confirm that you have the grounds of the two Arduinos connected?

-br

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