Contatore_ok

#define START 2
#define RELAY 3
#define MAIN_ON 4
#define HEAT_ON 5

unsigned long timeOn = millis(), startTime = 1000;

void setup() {
  Serial.begin(9600);
  Serial.println("START");
  pinMode(START, INPUT_PULLUP);
  pinMode(RELAY, OUTPUT);
  pinMode(MAIN_ON, OUTPUT);
  pinMode(HEAT_ON, OUTPUT);
  digitalWrite(HEAT_ON, LOW);
  digitalWrite(MAIN_ON, HIGH);
}

void loop() {
  if(digitalRead(START) == LOW){
    // Con il potenziometro imposti un tempo compreso tra 2 e 20 secondi
    timeOn = map(analogRead(A0), 0, 1023, 2000, 20000);
    delay(100);               // Semplice antirimbalzo dello switch
    startTime = millis();
    Serial.print("Start delay timer of ");
    Serial.print(timeOn/1000);
    Serial.println(" seconds.");
  }

  if(millis() - startTime <= timeOn){
    digitalWrite(RELAY, HIGH);
    digitalWrite(HEAT_ON, HIGH);
  }
  else{
    digitalWrite(RELAY, LOW);
    digitalWrite(HEAT_ON, LOW);
  }

}