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About Bond Manager

Elena

Hi

I have been experimenting with encryption and bonding and I think I don't understand completely the bond procedure.

To bond a device, it is necessary using the bond manager? Bond manager stores information about the bonding result in flash, right? What kind of information it is saved? What happens when the list of bonding devices is full?

I've been experimenting with encryption and after bonding, the communication is ok until I reset my device. Using the bond manager, I will avoid to delete the bonding information of Master Control to allow again the communication. Right?

Thanks in advance and sorry me :-(

Elena

Elena

  • 0

    The bond manager, or Device Manager (see SDK6.0 docs) stores information about the bonds in flash so it is persistent through a power cycle. When the list is full, I think the application needs to tell the DM which bond to erase to make room for a new bond.

  • 0 in reply to wlgrd

    Thanks you. I'll start right now to include the bond manager to my design

    Thanks again

  • 0

    The purpose of bonding is described in Vol 3, Part H, Section 6.5.1, in the Bluetooth Core Specification 4.2:

    The purpose of bonding is to create a relation between two Bluetooth devices based on a common link key (a bond). The link key is created and exchanged (pairing) during the bonding procedure and is expected to be stored by both Bluetooth devices, to be used for future authentication. In addition to pairing, the bonding procedure can involve higher-layer initialization procedures.

    The bond manager (and the device manager) is just a library we offer for persistently storing the bonding information (in flash). You don't have to use it, you can store the bonding information however you want to, or if you don't need bonding, you can just skip it all together.

    You can find information about the bond manager in SDK 5.2.0 documentation, and information about the device manager in SDK 7.1.0 documentation.

    If the list is full you will not be able to store more bonds, but you can increase the number of bonds you can have in the list, and you can delete bonds from the list.

    If you reset your device and you lose the bonding information, it is not working as it should. If you delete the bonding information from Master Control Panel you are no longer bonded.

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