Can not make scan_req_notification working...

[Alex Co]

Hi!

I am trying to get scan_req_notification to fire notifications when central devices issue scan reqs but without success until now. Here is my code:

Env: SDK15, SES, nrf52DK

In a ble template derived project, in the advertising_start() function I added this code before calling ble_advertising_start():

...

m_advertising.adv_params.scan_req_notification = 1;
m_advertising.adv_params.properties.type = BLE_GAP_ADV_TYPE_NONCONNECTABLE_SCANNABLE_UNDIRECTED;

ret_code_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);

...

Then from the ble_cus_on_ble_evt (observer) handler, I added a new case with:

case BLE_GAP_EVT_SCAN_REQ_REPORT:
            printf("\n SCAN_REQ called ...\n");
            const ble_gap_evt_t   * p_gap_evt = &p_ble_evt->evt.gap_evt;

            break;

I also added a breakpoint to the printf line

However, the BLE_GAP_EVT_SCAN_REQ_REPORT notification is never fired when using nRFConnect app or a Linux Bluez C app used for scan BLE devices. This linux C app was configured in order to do scan request:

...

le_set_scan_parameters_cp scan_params_cp;
memset(&scan_params_cp, 0, sizeof(scan_params_cp));
scan_params_cp.type   = 0x01; //00 Passive 01 Active

...

What am I doing wrong?

Thanks

Alex

[Edvin]

Hello,

I tested enabling the scan request notifications, and it works here. What SDK version do you use? SDK15.3.0?

I tested on both SDK15.3.0 and SDK15.0.0, and it worked in both. 

Where did you insert the line:

m_advertising.adv_params.scan_req_notification = 1;

The reason I ask is that in ble_advertising.c where the ble_advertising_start() function is defined, it uses p_advertising, and not m_advertising. Can you try to add it inside the ble_advertising_start() function?

Also, I don't know how your ble_cus_on_ble_evt() is set up, but can you try to add the case BLE_GAP_EVT_SCAN_REQ_REPORT in ble_evt_handler() in main.c as well? Do you get the event there?

One last thing: printf() is used in among others the ble_app_uart example, but it is not necessarily set up in the other examples. Do you see the other messages that you print using printf()?

Best regards,

Edvin

[Alex Co]

Hi!

The SDK I am using is nRF5_SDK_15.3.0_59ac345 and SD is S132 6.6.1

m_advertising is a global variable declared like this inside main.c

BLE_ADVERTISING_DEF(m_advertising);  

I openned ble_advertising.c and inside ble_advertising_start function I added

p_advertising->adv_params.scan_req_notification = 1;

right before

sd_ble_gap_adv_set_configure and sd_ble_gap_adv_start calls


I moved BLE_GAP_EVT_SCAN_REQ_REPORT to main.c ble_evt_handler()...

and now it works!


Then I moved again scan_req_notification = 1;

into the main.c again like:


m_advertising.adv_params.scan_req_notification = 1;


but did not work...


It seems that m_advertising global variable declared like this:

BLE_ADVERTISING_DEF(m_advertising);


does not override the advertising settings when called in main with:

 ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);




But it is ok, at least now this can works when adding it directly into ble_advertising.c

Thanks a lot!

Alex