Arduino kot časovni rele

Zgodi se mi namreč, da v primeru, če znotraj časa, ki je nastavljen na časovniku jaz ročno zaprem vrata potem po nastavljenem času pošlje pulz na motor in mi jih odpre.

//Global Variables
const byte BUTTON = 2; // our button pin
const byte LED = 12; // LED 


unsigned long buttonPushedTime; // when button was pushed
unsigned long doorOpenedTime; // when led was turned on
unsigned long buttonActivationDelay = 2500; // wait to turn on LED
unsigned long doorAutoCloseTimeout = 3600000; // turn off LED after this time
bool buttonPressed = false; // flag for when button is let go
bool systemArmed = false; // for LED is on or not.

void setup() {
	pinMode(BUTTON, INPUT_PULLUP);
	pinMode(LED, OUTPUT);
	digitalWrite(LED, HIGH);
}

void loop() {
	// get the time at the start of this loop()
	unsigned long currentTime = millis();

	// check the button
	if (digitalRead(BUTTON) == LOW) {
		// update the time when button was pushed
		buttonPushedTime = currentTime;
		buttonPressed = true;
	}

	// make sure this code isn't checked until after button has been let go
	if (buttonPressed) {
		//this is typical millis code here:
		if ((unsigned long)(currentTime - buttonPushedTime) >= buttonActivationDelay) {
			if (systemArmed) {
				digitalWrite(LED, LOW);
				// setup our next "state"
				systemArmed = false;
			}
			else {
				// okay, enough time has passed since the button was let go.
				digitalWrite(LED, HIGH);
				// setup our next "state"
				systemArmed = true;
				// save when the LED turned on
				doorOpenedTime = currentTime;				
			}

			// wait for next button press
			buttonPressed = false;
			
		}
	}

	// see if we are watching for the time to turn off LED
	if (systemArmed) {
		// okay, led on, check for how long
		if ((unsigned long)(currentTime - doorOpenedTime) >= doorAutoCloseTimeout) {
			systemArmed = false;
			digitalWrite(LED, LOW);
			delay(4000); // waits for four second 
			digitalWrite(LED, HIGH); // sets the LED on

		}
	}
}

Kolikor jaz vidim, je problem samo v tem, da začne časovnik odštevati ob prvi aktivaciji končnega stikala in ob morebitnem ročnem zapiranju znotraj nastavljenega časa še vedno odšteva.