!7

cmodule NotebookLid > DynBigNumber {
  transient Bool openLast;
  transient long openSince;
  
  start {
    setDescription("Notebook Lid");
    ownTimer(doEvery(1.0, r updateMe));
  }
  
  void update {
    Bool open = isNotebookLidOpen();
    if (isTrue(open) && isFalse(openLast)) {
      openSince = now();
      dm_say("Hello");
    } else if (isFalse(open) && isTrue(openLast))
      dm_say("Bye");
    openLast = open;
    setValue(now() < openSince + 10000 ? "JUST OPENED"
      : nullFalseTrue(open, "?", "CLOSED", "OPEN"));
  }
}