sd_ble_gap_connect

[Mihir Tailor]

Hello,

Which one of the following statements regarding "sd_ble_gap_connect" function call is true:

(1) Can sd_ble_gap_connect function put the central device into initiating mode, where the device listen for the Advertisement Packet from the BLE device mentioned in function call as p_peer_addr and then send the connection request (CONN_REQ) to that advertiser?

(2) Can sd_ble_gap_connect function send connection request (CONN_REQ) to the advertiser mentioned in function call as p_peer_addr?

Kindly reply this query

[Simon]

1. No, sd_ble_gap_connect(..) will not make the device listen for advertising packets. It will initiate a connection by sending a connection request. In order to start scanning for for adv. packets, the function sd_ble_gap_scan_start(..) needs to be called.

• After a scanning is started, BLE events will be handled by the ble event handler function (assuming you have set up a handler using NRF_SDH_BLE_OBSERVER).
• Then, if the event is of the type BLE_GAP_EVT_ADV_REPORT you can initiate a connection using sd_ble_gap_connect(..) and the address of the peer device (which can be found in the advertising event structure ble_gap_evt_adv_report_t).

2. Yes, see answer above

I hope this answer made it more clear for you.

Best regards, Simon