PM0237 datasheet(82/88 Pages) STMICROELECTRONICS

82 / 88 page

Design an application using BlueNRG, BlueNRG-MS ACI APIs

PM0237

82/88

DocID027104 Rev 2

The two devices are discovered thorugh the EVT_LE_ADVERTISING_REPORT events.

Once the two devices are discovered, Master&Slave device starts two connections

procedures (as Central) for connecting, respectively, to Slave_A and Slave_B devices:

/* Connect to Slave_A: Slave_A addreess type and address have been found

during the discovery procedure within the EVT_LE_ADVERTISING_REPORT event

ret= aci_gap_create_connection(LE_Scan_Interval=0x0010,

LE_Scan_Window=0x0010,

Peer_Address_Type= ”Slave_A address type”,

Peer_Address= ”Slave_A address”,

Conn_Interval_Min=0x6c,

Conn_Interval_Max=0x6c,

Conn_Latency=0x00,

Supervision_Timeout=0xc80,

Minimum_CE_Length=0x000c,

Maximum_CE_Length=0x000c)

/* Connect to Slave_B: Slave_B addreess type and address have been found

during the discovery procedure within the EVT_LE_ADVERTISING_REPORT event

ret= aci_gap_create_connection(LE_Scan_Interval=0x0010,

LE_Scan_Window=0x0010,

Peer_Address_Type= ”Slave_B address type”,

Peer_Address= ”Slave_B address”,

Conn_Interval_Min=0x6c,

Conn_Interval_Max=0x6c,

Conn_Latency=0x00,

Supervision_Timeout=0xc80,

Minimum_CE_Length=0x000c,

Maximum_CE_Length=0x000c)

Once connected, Master&Slave device enables the characteristics notification, on

both of them, using the aci_gatt_write_charac_descriptor() API. Slave_A

and Slave_B devices start the characterisitic notification by using the

aci_gatt_upd_char_val()

API.

At this stage, Master&Slave device enters in discovery mode (acting as Peripheral):

/* Put Master&Slave device in Discoverable Mode with Name = 'Test' =

[0x08,0x74,0x65,0x73,0x74*/

ret = aci_gap_set_discoverable(Advertising_Type= 0x00,

Advertising_Interval_Min=0x20,

Advertising_Interval_Max=0x100,

Local_Name_Length=0x05,

Local_Name=[0x08,0x74,0x65,0x73,0x74],

Slave_Conn_Interval_Min = 0x0006,

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