UM1865 datasheet(22/132 Pages) STMICROELECTRONICS

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Vendor specific commands

UM1865

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DocID027514 Rev 1

4.3

GAP VS commands and events

4.3.1

Overview

There are 4 GAP roles defined for LE devices:

 Broadcaster: Broadcaster is a device that sends advertising events. Broadcaster shall

have a transmitter and can optionally have a receiver.

 Observer: In observer role device receives the advertising events. An observer shall have

a receiver and can optionally have a transmitter.

 Peripheral: Any device that accepts the establishment of LE physical link is referred as

peripheral. A device operating in peripheral role will be slave in LL connection state. A

peripheral shall have both a transmitter and receiver.

 Central: A device that initiates the establishment of LE physical link is referred as central

device. A device operating in central role will be master in LL connection state. A central

shall have both a transmitter and receiver.

BlueNRG-MS is capable of being the peripheral or central in the GAP profile context

because:

 BlueNRG-MS controller is capable of acting as a slave in a connection, i.e. it can accept

the LL connection request from a central device and can support all the mandatory

requirements of the GAP peripheral role as dictated in Table 2.1, Part C, Generic Access

Profile of Bluetooth core specification 4.1.

 BlueNRG-MS controller is capable of acting as a master in a connection, i.e. it can issue

the LL connect request to a peripheral device and can support all the mandatory

requirements of the GAP central role as dictated in Table 2.1, Part C, Generic Access

Profile of Bluetooth core specification 4.1.

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