Device Manager

Device Manager Application Interface Abstraction. More...

Detailed Description

Device Manager Application Interface Abstraction.

The Device Manager module manages Active and Bonded Peers. Management of peer includes book keeping of contextual information like the Security Keys, GATT configuration and any application specific information.

Active Peers are devices which are connected, and may or may not be bonded. Bonded Peers are devices which are bonded, and may or may not be Active (Connected). Active Bonded Peer refers to a device which is connected and bonded.

Paired Devices refers to peer devices that are connected and have necessary context establishment/exchange for the current connection session. On disconnect, all contextual information is flushed. For example, SMP Information Exchanged during pairing and GATT Configuration is not retained on disconnection.

Note that this module allows management of contextual information but does not provide an interface for connection management. Therefore, entering connectible mode, connection establishment, or disconnection of a link with peer is not in scope of this module.

For bonded peers, the contextual information is required to be retained on disconnection and power cycling. Persistent storage of contextual information is handled by the module. This module categorizes the contextual information into 3 categories:

• Bonding Information Bond information is the information exchanged between local and peer device to establish a bond. It also includes peer identification information, like the peer address or the IRK or both. From here on this category of information is referred to as Device Context.
• Service/Protocol Information Service/Protocol information is the information retained for the peer to save on one-time procedures like the GATT Service Discovery procedures and Service Configurations. It allows devices to resume data exchange on subsequent reconnection without having to perform initial set-up procedures each time. From here on this category is referred to as Service Context.
• Application Information Application information is the context that the application would like to associate with each of the bonded device. For example, if the application chooses to rank its peers in order to manage them better, the rank information could be treated as Application Information. This storage space is provided to save the application from maintaining a mapping table with each Device Instance and Application Information. However, if the application have no use for this, it is possible to not use or employ this at compile time. From here on this category of information is referred to as Application Context.