org.bluez.GattManager - Man Page

GATT Manager allows external applications to register GATT services and profiles.

Registering a profile allows applications to subscribe to remote/client services.

Registering a service allows applications to publish a local/server GATT service, which then becomes available to remote devices. A GATT service is represented by a D-Bus object hierarchy where the root node corresponds to a service and the child nodes represent characteristics and descriptors that belong to that service. Each node must implement one of org.bluez.GattService(5), org.bluez.GattCharacteristic(5) or org.bluez.GattDescriptor(5) interfaces, based on the attribute it represents. Each node must also implement the standard D-Bus Properties interface to expose their properties. These objects collectively represent a GATT service definition.

To make service registration simple, bluetoothd(8) requires that all objects that belong to a GATT service be grouped under a D-Bus Object Manager that solely manages the objects of that service. Hence, the standard DBus.ObjectManager interface must be available on the root service path. An example application hierarchy containing two separate GATT services may look like this:

-> /com/example
  |   - org.freedesktop.DBus.ObjectManager
  |
  -> /com/example/service0
  | |   - org.freedesktop.DBus.Properties
  | |   - org.bluez.GattService1
  | |
  | -> /com/example/service0/char0
  | |     - org.freedesktop.DBus.Properties
  | |     - org.bluez.GattCharacteristic1
  | |
  | -> /com/example/service0/char1
  |   |   - org.freedesktop.DBus.Properties
  |   |   - org.bluez.GattCharacteristic1
  |   |
  |   -> /com/example/service0/char1/desc0
  |       - org.freedesktop.DBus.Properties
  |       - org.bluez.GattDescriptor1
  |
  -> /com/example/service1
    |   - org.freedesktop.DBus.Properties
    |   - org.bluez.GattService1
    |
   -> /com/example/service1/char0
        - org.freedesktop.DBus.Properties
        - org.bluez.GattCharacteristic1

When a service is registered, bluetoothd(8) will automatically obtain information about all objects using the service's Object Manager. Once a service has been registered, the objects of a service should not be removed. If bluetoothd(8) receives an InterfacesRemoved signal from a service's Object Manager, it will immediately unregister the service. Similarly, if the application disconnects from the bus, all of its registered services will be automatically unregistered. InterfacesAdded signals will be ignored.

Service

org.bluez

Interface

org.bluez.GattManager1

Object path

[variable prefix]/{hci0,hci1,...}