anthony8i:
thanks! Yeah I do get the concept but I really need an example?
Here is the button example:
// constants won't change. They're used here to
// set pin numbers:
const int buttonPin = 2; // the number of the pushbutton pin
const int ledPin = 13; // the number of the LED pin
// variables will change:
int buttonState = 0; // variable for reading the pushbutton status
void setup() {
// initialize the LED pin as an output:
pinMode(ledPin, OUTPUT);
// initialize the pushbutton pin as an input:
pinMode(buttonPin, INPUT);
}
void loop(){
// read the state of the pushbutton value:
buttonState = digitalRead(buttonPin);
// check if the pushbutton is pressed.
// if it is, the buttonState is HIGH:
if (buttonState == HIGH) {
// turn LED on:
digitalWrite(ledPin, HIGH);
}
else {
// turn LED off:
digitalWrite(ledPin, LOW);
}
}
Now add some sending:
const int buttonPin = 2; // the number of the pushbutton pin
// variables will change:
int buttonState = 0; // variable for reading the pushbutton status
void setup() {
// initialize the pushbutton pin as an input:
pinMode(buttonPin, INPUT);
// initialize serial
Serial.begin (9600);
}
void loop(){
// read the state of the pushbutton value:
buttonState = digitalRead(buttonPin);
// send to other Arduino
Serial.print (buttonState);
// give it a chance to react
delay (100);
}
Confirm in the serial monitor that you see 0 or 1 being sent.
Now look at one of the serial examples to read in the 0 or 1 and light up the LED on the other board appropriately.