setup

The setup() function is called when your program starts. Use it to initialize your variables, pin modes, start using libraries, etc.

Example

 

int buttonPin = 3;

void setup()
{
  beginSerial(9600);
  pinMode(buttonPin, INPUT);
}

void loop()
{
  if (digitalRead(buttonPin) == HIGH)
    serialWrite('H');
  else
    serialWrite('L');

  delay(1000);
}
 

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