import com.pi4j.io.gpio.GpioController;
import com.pi4j.io.gpio.GpioFactory;
import com.pi4j.io.gpio.GpioPinDigitalOutput;
import com.pi4j.io.gpio.PinState;
import com.pi4j.io.gpio.PinPullResistance;
import com.pi4j.io.gpio.RaspiPin;

public class BlinkLed {
	
	public static void main(String[] args) throws InterruptedException {
		
		int nbBlinks = 3;
		if (args.length > 0) {
			try {
				nbBlinks = Integer.parseInt(args[0]);
			} catch (NumberFormatException e) {}
		}
		
		final GpioController gpioCtrl = GpioFactory.getInstance();
		
		final GpioPinDigitalOutput pin = gpioCtrl.provisionDigitalOutputPin(RaspiPin.GPIO_01, "Red led", PinState.HIGH);
		
		pin.setShutdownOptions(true, PinState.LOW, PinPullResistance.OFF);
		
		for (int i=0;i<nbBlinks;i++){
			pin.pulse(1000, true);
			Thread.sleep(1000);
		}
		
		gpioCtrl.shutdown();
		
	}
	
}