why ble_advertising_start()returns error code 18

[helen]

Excuse me:

                    Project in nRF5_SDK_17.0.2_d674dde\examples\ble_peripheral\ble_app_hids_keyboard\pca10040e\s112\ses,After the device is connected, I call the sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION) to disconnect，Then call the  advertising_start(true)  to delete the binding，After the binding is deleted, the advertising_start(false) function is called to start advertise ，then return the error code 18.

[ovrebekk]

Hi

After you call sd_ble_gap_disconnect(..) you should wait for the BLE_GAP_EVT_DISCONNECTED event to be called, before continuing the operation of erasing bonds and restarting advertising. 

Error 18 is the NRF_ERROR_CONN_COUNT error, which could indicate that you are trying to start advertising while the previous connection is not properly closed. 

Best regards
Torbjørn 

[helen]

Ok,Why does it take more than 10s to trigger BLE_GAP_EVT_DISCONNECTED event when calling sd_ble_gap_disconnect(..) on win10？

[ovrebekk]

Hi 

I have asked the SoftDevice team for input on this, and they asked me for the following:

1) Which SoftDevice you are using. S112 v7.2.0 I believe?

2) What is the disconnect reason returned with the BLE_GAP_EVT_DISCONNECTED event?

3) Are you able to capture a sniffer trace when the disconnect happens?

Getting an answer to 1) and 2) is most important, but if the issue is hard to investigate then having a sniffer trace can be of great help. 

Best regards
Torbjørn