how to use the tabs

Projects Programming
2

Here is an example. This is the subroutine sketch code. Note no setup or loop functions. I would save this as myBlink.

void myBlink() {
  digitalWrite(13,HIGH);
  delay(500);
  digitalWrite(13,LOW);
  delay(500);
}

Then the main sketch code

void setup() {
  Serial.begin(9600);
  pinMode(13,OUTPUT);
}

void loop() {
  Serial.println("tick");
  myBlink();
}

After you enter this sketch, go to Sketch in the toolbar and select "add file", then find and select myBlink (the first code you entered). It will appear as a second tab, and you will be able to call the myBlink routine from your main sketch.

edit: I forgot to set pin 13 as an output. Corrected.