Custom BLE profile creation

[pal_722]

Hi 
I am currently working with nrf5340  board to create Custom BLE profiles for data transfer to mobile app.
I am not finding any document or videos that gives me a detailed guide on how to create profile from scratch. I am following your technical documents, but those are just telling about how to build, test or debug and not really anything on how to code or what APIs to use. Can you guide me on which document to follow? I am not sure if I have missed out any document?

Thank you 
Regards 
Pallavi LS 

[Turbo J]

The NUS service is a non-standard profile and not terribly difficult to customize. Alternatively you could just use it directly with your app - but I recommend using at least a different UUID.