void myTimerInterrupt() { // TODO Your code goes here // The following functions may be useful here: // Timer3.start(); // Start counting & clear counter // Timer3.stop(); // => stop counting but do not clear counter // Timer3.restart(); // => clear counter // Timer3.resume(); // => Start, without clearing counter } void setup() { Timer3.initialize(20000); Timer3.attachInterrupt(myTimerInterrupt); Timer3.start(); }