Una cosa del genere può andare?
const int ledPin = 13; // the number of the LED pin
// Variables will change:
int ledState = LOW; // ledState used to set the LED
long previousMillis = 0; // will store last time LED was updated
// the follow variables is a long because the time, measured in miliseconds,
// will quickly become a bigger number than can be stored in an int.
long interval = 6000; // interval at which to blink (milliseconds)
void setup() {
// set the digital pin as output:
pinMode(ledPin, OUTPUT);
Serial.begin(57600);
}
void loop()
{
// here is where you'd put code that needs to be running all the time.
// check to see if it's time to blink the LED; that is, if the
// difference between the current time and last time you blinked
// the LED is bigger than the interval at which you want to
// blink the LED.
unsigned long currentMillis = millis();
Serial.write(currentMillis - previousMillis + "\n");
if(currentMillis - previousMillis > interval ) {
// save the last time you blinked the LED
previousMillis = currentMillis;
interval=3000;
// if the LED is off turn it on and vice-versa:
if (ledState == LOW){
ledState = HIGH;
}
else
ledState = LOW;
}
else{
if (previousMillis==0)
ledState = HIGH;
}
// set the LED with the ledState of the variable:
digitalWrite(ledPin, ledState);
}
A me sembra che funzioni.