PM0237 datasheet(26/88 Pages) STMICROELECTRONICS

26 / 88 page

Bluetooth low energy technology

PM0237

26/88

DocID027104 Rev 2

For a detailed description about the GATT procedures and related responses events refer to

the Bluetooth specification v4.0 on Section 4: References.

1.9

Generic access profile (GAP)

The Bluetooth system defines a base profile implemented by all Bluetooth devices called

Generic Access Profile (GAP). This generic profile defines the basic requirements of a

Bluetooth device.

The four GAP profiles roles are described in the table below:

Write long characteristic value

Prepare write response

Execute write response

Reliable write

Prepare write response

Execute write response

Table 18. Server-initiated procedures and related response events

Procedure

Response events

Notifications

No event is generated

Indications

Confirmation event

Table 17. Client-initiated procedures and related response events (continued)

Procedure

Response events

Table 19. GAP roles(1)

1. M=Mandatory; O=Optional

Role

Description

Transmitter Receiver

Typical example

Broadcaster Sends advertising events

Temperature sensor which

sends temperature values

Observer

Receives advertising events

Temperature display which

just receives and display

temperature values

Peripheral

Always a slave.

It is on connectable

advertising mode.

Supports all LL control

procedures Encryption is

optional .

Watch

Central

Always a master.

It never advertises.

It supports active or passive

scan. It supports all LL

control procedures

Encryption is optional

Mobile phone

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