PM0237 datasheet(54/88 Pages) STMICROELECTRONICS

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Design an application using BlueNRG, BlueNRG-MS ACI APIs

PM0237

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DocID027104 Rev 2

3.4

Create a connection: discoverable and connectable APIs

In order to establish a connection between a BlueNRG GAP central (master) device and a

BlueNRG GAP peripheral (slave) device, the GAP discoverable/connectable modes and

procedures can be used as described in Table 34: ACI: GAP modes APIs, Table 35: ACI:

discovery procedures APIs, Table 36: ACI: connection procedures APIs and by following the

related ACI APIs described in the user manuals UM1755 and UM1865, Section 4:

References.

GAP peripheral discoverable and connectable modes APIs

Different types of discoverable and connectable modes can be used as described by the

following APIs:

Table 34. ACI: GAP modes APIs

API

Supported advertising

event types

Description

aci_gap_set_discoverable()

0x00: connectable

undirected advertising

(default)

Sets the device in general

discoverable mode.

The device is discoverable until

the host issues the

aci_gap_set_non_discover

able()

API.

0x02: scannable undirected

advertising

0x03: non-connectable

undirected advertising

aci_gap_set_limited_discoverable(

)

0x00: connectable

undirected advertising

(default);

Sets the device in limited

discoverable mode. The device

is discoverable for a maximum

period of TGAP

(lim_adv_timeout) = 180

seconds. The advertising can be

disabled at any time by calling

aci_gap_set_non_discover

able()

API

0x02: scannable undirected

advertising;

0x03: non-connectable

undirected advertising.

aci_gap_set_non_discoverable()

Sets the device in non-

discoverable mode. This

command disables the LL

advertising and sets the device in

standby state.

aci_gap_set_direct_connectable()

Sets the device in direct

connectable mode. The device is

directed connectable mode only

for 1.28 seconds. If no

connection is established within

this duration, the device enters

non-discoverable mode and

advertising has to be

enabled again explicitly.

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