hello, I know the ble device ,have central and peripheral and have some name(server/client and Observer/ Broadcaster).
The peripheral(server) has data that is needed by other devices. ; central (client) uses the information served up by peripherals to accomplish some particular task.
And almost device is peripheral, but i don't know what kind of service need be a central?and why(power consumption or other reason(app state) )? (for the nordic sdk sample,the alert notification service is client)
