My device was designed with SDK 15.0, the APP_ADV_DURATION is set to 0 in order to have the device in advertising for all time.

Now I try to use the SDK 15.3 but when I change the APP_ADV_DURATION from 18000 to 0 I have an error 7 on this call:

       ret = sd_ble_gap_adv_set_configure(&p_advertising->adv_handle, p_advertising->p_adv_data, &p_advertising->adv_params);

what's different between 15.0 and 15.3 on this ?

How is possible to have never ending advertising  on 15.3 ?


  • Hi,

    Please make sure you are using BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE and not the BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE flag in your advertising_init() routine. With the limited discovery flag, you are only allowed to advertise for a maximum of 180 seconds according to the BT specification. The Softdevice enforces this requirement, and that's why you may get the invalid param error when you disable the timeout.

    Best regards,