final MspMote mspMote = (MspMote) mote;
leds = mspMote.getCPU().getChip(Leds.class);
if (leds == null) {
throw new IllegalStateException("Mote is not equipped with leds");
}
leds.addStateChangeListener(new StateChangeListener() {
public void stateChanged(Object source, int oldState, int newState) {
setChanged();
notifyObservers();
}