How to dismiss unbonded host that reconnects

[TEJ]

I am trying learn how to handle a central when the bond has been deleted on the device only.

It is a HID device using softdevice7 / sdk6.1, with max 1 bonded centrals.

Pressing the pair-button deletes any existing bond, disconnects and start advertising. The problem is that the central (iOS in this case) immediately reconnects to the device and never disconnect. Log of incoming events looks like this:

<BLE_GAP_EVT_CONNECTED
  dm_ble_evt_handler()
  main_on_ble_evt()
  Exit state: Pairing
  Enter state: Connected
<BLE_GAP_EVT_SEC_INFO_REQUEST
  dm_ble_evt_handler()
  main_on_ble_evt()
<BLE_GAP_EVT_SEC_INFO_REQUEST
  dm_ble_evt_handler()
  main_on_ble_evt()

and eventually:

<BLE_GAP_EVT_CONN_PARAM_UPDATE
  dm_ble_evt_handler()
  main_on_ble_evt()

the GAP handler in device_manager_peripheral.c responds to both BLE_GAP_EVT_SEC_INFO_REQUEST events with sd_ble_gap_sec_info_reply(conn_handle, NULL, NULL)

What is supposed to happen after this? who should drop the connection & when?

[Petter Myhre]

You can be in a connection without being paired. A failed pairing only means you failed pairing, not that the connection must be terminated. Please see this MSC.

If you want to disconnect you should use sd_ble_gap_disconnect(), please see this MSC.