How to scan only Advertising Packet BLE [ANDROID]

RE: How to scan only Advertising Packet BLE [ANDROID]

Hung Bui — Mon, 17 Nov 2014 15:40:12 GMT

@hssn601: Then I think changing the ADV type is the best solution. You can switch to scannable advertising type periodically, e.g 5 seconds every 1 minute.

RE: How to scan only Advertising Packet BLE [ANDROID]

hssn601 — Mon, 17 Nov 2014 15:35:41 GMT

if phone send scan request again and again than beacon will transmit extra 32 bytes which will drain more battery, i only need scan response when needed to save battery.

RE: How to scan only Advertising Packet BLE [ANDROID]

Hung Bui — Mon, 17 Nov 2014 15:25:17 GMT

@hssn601: To switch between different advertising type, you would need to stop advertising, reconfigure the parameter m_adv_params.type and call sd_ble_gap_adv_start() again.

Note that if you advertise in non-connectable mode the minimum advertising interval should be >100ms

Just for curiousity, may I ask the reason why you don't want the phone to send scan request ?

RE: How to scan only Advertising Packet BLE [ANDROID]

hssn601 — Mon, 17 Nov 2014 15:03:51 GMT

I am looking for a solution to BLE_GAP_ADV_TYPE_ADV_NONCONN_IND | ADV_SCAN_IND or ADV_IND on runtime as some times i need scan response and some times only advertising data.

RE: How to scan only Advertising Packet BLE [ANDROID]

Hung Bui — Mon, 17 Nov 2014 14:55:03 GMT

@hssn601: As far as I know, it's not possible that the app on the phone can choose to scan in passive mode or active mode. What user9384 suggested is correct, you can change the flag to BLE_GAP_ADV_TYPE_ADV_NONCONN_IND so that the phone won't send scan request packet. If you still want to have extra 32 bytes, you can switch the flag back to ADV_SCAN_IND or ADV_IND when needed.

RE: How to scan only Advertising Packet BLE [ANDROID]

hssn601 — Fri, 14 Nov 2014 08:17:28 GMT

but i need to get extra 32bytes(scan responce) when required.

RE: How to scan only Advertising Packet BLE [ANDROID]

Knut Eldhuset — Fri, 14 Nov 2014 08:12:35 GMT

On the beacon, you can set advertising type to BLE_GAP_ADV_TYPE_ADV_NONCONN_IND. The peer is not allowed to send scan request nor connection requests, and this should be honored automatically by Android.

RE: How to scan only Advertising Packet BLE [ANDROID]

hssn601 — Fri, 14 Nov 2014 06:37:34 GMT

i am also in search of how to scan for ble devices passively. Unfortunately didn't find any method in android ble api.

RE: How to scan only Advertising Packet BLE [ANDROID]

Salman — Fri, 14 Nov 2014 06:35:40 GMT

I am having the same problem.