Non-connectable advertisement while scanning as a Central

[Boaz]

Is it possible to advertise in non-connectable mode while scanning/connecting/connected as a Central?

[Ole Bauck]

Yes, it is possible.

You can use ble_advdata_set(..) to set the packet data and then start advertising with the SoftDevice call sd_ble_gap_adv_start(..). See the ble_app_beacon example for how to do this in more detail.

[Ole Bauck]

Did a quick test and saw no issues:

advertising_init();    //from ble_app_template example
err_code = ble_advertising_start(BLE_ADV_MODE_FAST);    //from ble_app_template example
APP_ERROR_CHECK(err_code);

nrf_delay_ms(5000);

err_code = sd_ble_gap_adv_stop();
APP_ERROR_CHECK(err_code);

advertising_beacon_init();    //advertising_init() from ble_app_beacon example
err_code = sd_ble_gap_adv_start(&m_adv_params);
APP_ERROR_CHECK(err_code);

As this discussion is not related to the original question anymore I suggest that you make a new question.