This section will consider some examples of central-peripheral communication in Bluetooth Low Energy so that the readers get a clear vision of the possibilities. As described before, central and peripherals are the terms used in accordance with the GATT roles. The advertiser is peripheral and the connection initiator is central. Peripheral will broadcast its identity but once it is paired with a central, its identity will only be recognized by that central until unpaired. This function gives better security to BLE peripherals because they will not be shown in the open scan by other devices.
In central-peripheral communication, centrals do not advertise their existence (unless it is a ...
