Delete bonding after disconnect in S120

[sowmya]

Hello,

I am working on S120 v2.1.0 and SDK 9.0 for central and I am able to connect to my iPad. Now I need the central to delete the bonding information stored using pstorage that is when I get BLE_GAP_EVT_DISCONNECTED in on_ble_evt callback function. I am using the below code snippet to delete:

case BLE_GAP_EVT_DISCONNECTED:
       err_code = dm_device_delete(&m_dm_device_handle);
       APP_ERROR_CHECK(err_code);
       break;

But I am getting the hardfault and when I debugged, the state_data_erase_swap_entry_run function where it will erase the flash is causing the hardfault.

Is this the proper way to delete peripheral bonding? Or can anyone suggest me the way to erase the bonding information?

Regards,
Sowmya

[Vidar Berg]

You must verify that you are passing a valid handle to this function. That is, the same handle you used in the previous connection. Please have a look at this Github example here to see how this API can be used.

[sowmya]

I modified the device manager using app_bond functions used in that example project. But I am getting the error DM_NO_APP_CONTEXT. What may the reason for this error?

Edit: It is due to the context_len which is loading 0xFFFFFFFF from pstorage_load(&context_len).

[Vidar Berg]

The app context is used for handling of bonds in the example. That is, to determine which bond to delete. In your case you only need to call dm_device_delete() with the corect dm_handle.