""Yes.
Yes.
Yes.
No. This simple sketch will simply light up the onboard LED for 1/4 second if any serial data is received.
Make that part work, then start adding in reading of buttons, and changing the message that is sent with info on the button that was pressed, and decoding the message that was sent to light up an LED.
On the input side, turn on the internal pullup resistors and use a switch to connect the input pin to ground, read the pin and act when a low is seen.
On the output side, connect one side of a 470 ohm resistor to 5V, the other side to the anode of an LED, and the cathode of the LED to an output pin. When the output goes low the LED will turn on.""
so what would a very simple sketch to have the arduinos do this? I really don't know what libraries to use? wire or softserial or master/slave?