GATT profile + pydbus

com.example.conf

<!DOCTYPE busconfig PUBLIC
          "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
          "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
<busconfig>
  <policy context="default">
    <allow own="com.example"/>
    <allow own="com.example.profile"/>
    <allow send_destination="com.example"/>
    <allow send_destination="com.example.profile"/>
    <allow send_destination="com.example.profile" send_interface="com.example.profile"/>
    <allow send_interface="com.example"/>
  </policy>
</busconfig>

gatt-profile.py

#!/usr/bin/env python

import time
from gi.repository import GLib
from pydbus import SystemBus, Variant
from pydbus.generic import signal

GATT_PROFILE_IFACE = 'org.bluez.GattProfile1'
GATT_MANAGER_IFACE = 'org.bluez.GattManager1'

class Application(object):
    """
    <node>
        <interface name="org.freedesktop.DBus.ObjectManager">
            <method name="GetManagedObjects">
                <arg name="objects" type="a{oa{sa{sv}}}" direction="out"/>
            </method>
            <signal name="InterfacesAdded">
                <arg name="object" type="o"/>
                <arg name="interfaces" type="a{sa{sv}}"/>
            </signal>
            <signal name="InterfacesRemoved">
                <arg name="object" type="o"/>
                <arg name="interfaces" type="as"/>
            </signal>
        </interface>
    </node>
    """
    uuids = ['00001809-0000-1000-8000-00805f9b34fb']

    InterfacesAdded = signal()
    InterfacesRemoved = signal()

    def GetManagedObjects(self):
        response = {}
        response['/com/example/profile'] = \
                {
                    GATT_PROFILE_IFACE: {
                        'UUIDs': Variant('as', self.uuids)
                    }
                }
        return response


class Profile(object):
    """
    <node>
        <interface name="org.bluez.GattProfile1">
            <method name="Release">
            </method>
            <property name="UUIDs" type="as" access="read">
            </property>
        </interface>
    </node>
    """
    uuids = ['00001809-0000-1000-8000-00805f9b34fb']

    def Release(self):
        print("Release")

    @property
    def UUIDs(self):
        return self.uuids


bus = SystemBus()

bus.publish('com.example', Application(), \
        ('profile', Profile()))


manager = bus.get('org.bluez', '/org/bluez/hci0')[GATT_MANAGER_IFACE]

manager.RegisterApplication('/com/example', {})

loop = GLib.MainLoop()
loop.run()

manager.UnRegisterApplication('/com/example')