Yes I know that this is an old post but I still had some questions on it so I emailed Zeitronix and here is what I was told "It looks like USB serial adapter driver problem. Most software's out there have 4 COM ports. We designed it with 8. More than
enough since you are using only one." I even posted to him a link to this page. I just thought I would see what you guys think and that it could possibly answer some questions that other people had about the display and just the wb o2 with a laptop.