I have read several stuff in the internet and understood that its not possible to use bluetooth with two iOS devices in Background. It is only partially possible. If the peripheral is in Background the UUID is no more visible. And if the central is in Background it is in passive scanning mode which means it can only search for a specific UUID, which is not visible when the peripheral is in Background.
I checked the "new" Exposure Notification service from Apple and Google and in this case I was able to see a UUID with 16-bits and a custom ID. This also works in background really well. Do you think there is any possibility to use this to enable the iOS peripheral also works in Background. If Its possible to change the ID or at least to read our which ID is currently advertised would be also helpful. What do you guys think is this possible?
