Bonding with PassKey Display using Device Manager

[soumil]

Hi,

I am trying to bond the nrf51-DK with the android smartphone. I want to display the passkey to the user which would be done using BLE_GAP_IO_DISPLAY_ONLY. After which how should the keys entered by the user be compared and authorization be given to the user. Do we need to use BLE events for this or device manager can implement this ?

[FormerMember]

If you implement the device manager to your application, it will handle all the events related to the bonding process. For how to implement the device manager, I would recommend you to take a look at the "Implementing the device manager" tutorial.

Note that in the next version of the SDK, SDK 11.0.0, the device manager will be replaced by "peer manager". SDK 11.0.0 alpha does also use peer manager.

[soumil]

But when I enter the pass key it fails to bond. It gives an error in the nrfmaster control panel. Error 22 (0x16): GATT CONN TERMINATE LOCAL HOST

[FormerMember]

Could you use the sniffer to track what is being transmitted over the air? The flow of the events should be the same as in this message sequence chart.

[soumil]

Okay sure I will try that. Do you have any reason though on why this is happening?

[FormerMember]

If the settings in the BLE_GAP_SEC_PARAMS_REQUEST don't match the settings in sd_ble_gap_sec_params_reply(..), I think the central will disconnect. However, since setting up an encrypted link is a GAP process and the disconnect error code is a GATT error, the reason may be something else.