LTK Zephyr Central

[mrowe]

I can pair and bond as a Zephyr central via bt_conn_auth_register & bt_conn_security().   

When the bond is successful I get a callback to cb_pairing_success(struct bt_conn *con, boot is_bonded).

My question is, how to I access the LTK so that I can save it.  I see it in the bt_conn structure but get dereferencing errors when I ever I add code to access it.

It appears that the application does not have access to the LTK???  There are no examples of how to handle this so ... not sure what to do.

Thanks,

[email protected]

[Joakim Andersson]

Hi.

The host will handle saving of the LTK, as long as you have BT_SETTINGS and flash storage enabled.

Make sure these configs are set:

CONFIG_FLASH=y
CONFIG_FLASH_PAGE_LAYOUT=y
CONFIG_FLASH_MAP=y
CONFIG_FCB=y
CONFIG_SETTINGS=y

Then you need to call settings_load() after bt_enable()

See samples/bluetooth/peripheral/src/main.c