Hi Christopher, On Tue, May 26, 2020 at 9:25 AM Christopher de Vidal <cbdevidal.jk1@xxxxxxxxx> wrote: > > So let me make sure I understand. The devices themselves have their > own Bluetooth addresses (similar to MAC addresses, I don't know the > proper term) which are unique among every physical device sold. And > also there is one (and only one) service UUID which is shared among > all 1,000+ peripherals which I sell, and 19 characteristic UUIDs that > are shared among the physical peripherals. The devices come with their > own Bluetooth "MAC" and I only need to obtain 20 UUIDs in total for > the product line. Did I get that right? Check out this article (Step 4: Assign UUIDs to Custom Services and Characteristics): https://www.novelbits.io/bluetooth-gatt-services-characteristics/