callback when sending scan request PDU to a peripheral.

RE: callback when sending scan request PDU to a peripheral.

Vishnu — Tue, 15 Dec 2020 14:57:50 GMT

ok Thanks! will try!

RE: callback when sending scan request PDU to a peripheral.

Hung Bui — Tue, 15 Dec 2020 13:54:21 GMT

I don't think it's possible. But you can do the opposite. You can do passive only scanning (no scan request) and when you find a device that you want to do scan request, you switch to ative scanning with the address filter for the advertiser(s).

RE: callback when sending scan request PDU to a peripheral.

Vishnu — Tue, 15 Dec 2020 13:30:09 GMT

Thanks for your reply Hung Bui.

Buy any chance can we abort sending scan request PDU from central for particular peripheral devices?

in other words.. can we restrict scan request PDUs before sending from central(when active scanning) ..so that peripheral device may not receive BLE_GAP_EVT_SCAN_REQ_REPORT event?

RE: callback when sending scan request PDU to a peripheral.

Hung Bui — Tue, 15 Dec 2020 13:05:09 GMT

Hi Vishnu,

On the peripheral side you will receive BLE_GAP_EVT_SCAN_REQ_REPORT event when there is a scan request.

On the central side you receive BLE_GAP_EVT_ADV_REPORT when you receive an advertising packet, and when you receive a scan response packet.
So you don't receive an event when you sent scan request but you do receive an event when the advertiser reply with a scan response packet. To be able to detect if the data is from an advertising packet or scan response packet you need to check the "type" value inside ble_gap_evt_adv_report_t struct when you receive the event.