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431 lines
14 KiB
Python
431 lines
14 KiB
Python
#!/usr/bin/env python
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#
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# Copyright 2019 Espressif Systems (Shanghai) PTE LTD
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# Creating GATT Application which then becomes available to remote devices.
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from __future__ import print_function
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import sys
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try:
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import dbus
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import dbus.service
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except ImportError as e:
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if 'linux' not in sys.platform:
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raise e
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print(e)
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print('Install packages `libgirepository1.0-dev gir1.2-gtk-3.0 libcairo2-dev libdbus-1-dev libdbus-glib-1-dev` for resolving the issue')
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print('Run `pip install -r $IDF_PATH/tools/ble/requirements.txt` for resolving the issue')
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raise
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DBUS_OM_IFACE = 'org.freedesktop.DBus.ObjectManager'
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DBUS_PROP_IFACE = 'org.freedesktop.DBus.Properties'
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GATT_MANAGER_IFACE = 'org.bluez.GattManager1'
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GATT_SERVICE_IFACE = 'org.bluez.GattService1'
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GATT_CHRC_IFACE = 'org.bluez.GattCharacteristic1'
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GATT_DESC_IFACE = 'org.bluez.GattDescriptor1'
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SERVICE_UUIDS = {
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'ALERT_NOTIF_SVC_UUID': '00001811-0000-1000-8000-00805f9b34fb'
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}
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CHAR_UUIDS = {
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'SUPPORT_NEW_ALERT_UUID': '00002A47-0000-1000-8000-00805f9b34fb',
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'ALERT_NOTIF_UUID': '00002A44-0000-1000-8000-00805f9b34fb',
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'UNREAD_ALERT_STATUS_UUID': '00002A45-0000-1000-8000-00805f9b34fb'
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}
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DESCR_UUIDS = {
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'CCCD_UUID': '00002902-0000-1000-8000-00805f9b34fb'
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}
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class InvalidArgsException(dbus.exceptions.DBusException):
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_dbus_error_name = 'org.freedesktop.DBus.Error.InvalidArgs'
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class NotSupportedException(dbus.exceptions.DBusException):
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_dbus_error_name = 'org.bluez.Error.NotSupported'
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class Application(dbus.service.Object):
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"""
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org.bluez.GattApplication1 interface implementation
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"""
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def __init__(self, bus, path):
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self.path = path
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self.services = []
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dbus.service.Object.__init__(self, bus, self.path)
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def __del__(self):
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pass
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def add_service(self, service):
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self.services.append(service)
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@dbus.service.method(DBUS_OM_IFACE, out_signature='a{oa{sa{sv}}}')
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def GetManagedObjects(self):
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response = {}
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for service in self.services:
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response[service.get_path()] = service.get_properties()
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chrcs = service.get_characteristics()
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for chrc in chrcs:
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response[chrc.get_path()] = chrc.get_properties()
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descs = chrc.get_descriptors()
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for desc in descs:
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response[desc.get_path()] = desc.get_properties()
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return response
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def get_path(self):
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return dbus.ObjectPath(self.path)
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def Release(self):
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pass
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class AlertNotificationApp(Application):
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'''
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Alert Notification Application
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'''
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def __init__(self, bus, path):
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Application.__init__(self, bus, path)
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self.service = AlertNotificationService(bus, '0001')
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self.add_service(self.service)
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class Service(dbus.service.Object):
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"""
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org.bluez.GattService1 interface implementation
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"""
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PATH_BASE = '/org/bluez/hci0/service'
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def __init__(self, bus, index, uuid, primary=False):
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self.path = self.PATH_BASE + str(index)
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self.bus = bus
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self.uuid = uuid
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self.primary = primary
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self.characteristics = []
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dbus.service.Object.__init__(self, bus, self.path)
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def get_properties(self):
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return {
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GATT_SERVICE_IFACE: {
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'UUID': self.uuid,
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'Primary': self.primary,
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'Characteristics': dbus.Array(
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self.get_characteristic_paths(),
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signature='o')
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}
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}
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def get_path(self):
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return dbus.ObjectPath(self.path)
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def add_characteristic(self, characteristic):
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self.characteristics.append(characteristic)
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def get_characteristic_paths(self):
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result = []
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for chrc in self.characteristics:
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result.append(chrc.get_path())
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return result
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def get_characteristics(self):
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return self.characteristics
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@dbus.service.method(DBUS_PROP_IFACE,
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in_signature='s',
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out_signature='a{sv}')
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def GetAll(self, interface):
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if interface != GATT_SERVICE_IFACE:
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raise InvalidArgsException()
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return self.get_properties()[GATT_SERVICE_IFACE]
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class Characteristic(dbus.service.Object):
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"""
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org.bluez.GattCharacteristic1 interface implementation
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"""
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def __init__(self, bus, index, uuid, flags, service):
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self.path = service.path + '/char' + str(index)
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self.bus = bus
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self.uuid = uuid
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self.service = service
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self.flags = flags
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self.value = [0]
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self.descriptors = []
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dbus.service.Object.__init__(self, bus, self.path)
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def get_properties(self):
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return {
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GATT_CHRC_IFACE: {
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'Service': self.service.get_path(),
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'UUID': self.uuid,
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'Flags': self.flags,
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'Value': self.value,
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'Descriptors': dbus.Array(self.get_descriptor_paths(), signature='o')
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}
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}
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def get_path(self):
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return dbus.ObjectPath(self.path)
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def add_descriptor(self, descriptor):
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self.descriptors.append(descriptor)
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def get_descriptor_paths(self):
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result = []
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for desc in self.descriptors:
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result.append(desc.get_path())
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return result
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def get_descriptors(self):
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return self.descriptors
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@dbus.service.method(DBUS_PROP_IFACE, in_signature='s', out_signature='a{sv}')
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def GetAll(self, interface):
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if interface != GATT_CHRC_IFACE:
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raise InvalidArgsException()
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return self.get_properties()[GATT_CHRC_IFACE]
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@dbus.service.method(GATT_CHRC_IFACE, in_signature='a{sv}', out_signature='ay')
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def ReadValue(self, options):
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print('\nDefault ReadValue called, returning error')
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raise NotSupportedException()
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@dbus.service.method(GATT_CHRC_IFACE, in_signature='aya{sv}')
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def WriteValue(self, value, options):
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print('\nDefault WriteValue called, returning error')
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raise NotSupportedException()
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@dbus.service.method(GATT_CHRC_IFACE)
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def StartNotify(self):
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print('Default StartNotify called, returning error')
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raise NotSupportedException()
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@dbus.service.method(GATT_CHRC_IFACE)
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def StopNotify(self):
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print('Default StopNotify called, returning error')
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raise NotSupportedException()
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@dbus.service.signal(DBUS_PROP_IFACE,
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signature='sa{sv}as')
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def PropertiesChanged(self, interface, changed, invalidated):
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pass
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# print('\nProperties Changed')
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class Descriptor(dbus.service.Object):
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"""
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org.bluez.GattDescriptor1 interface implementation
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"""
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def __init__(self, bus, index, uuid, flags, characteristic):
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self.path = characteristic.path + '/desc' + str(index)
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self.bus = bus
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self.uuid = uuid
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self.flags = flags
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self.chrc = characteristic
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dbus.service.Object.__init__(self, bus, self.path)
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def get_properties(self):
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return {
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GATT_DESC_IFACE: {
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'Characteristic': self.chrc.get_path(),
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'UUID': self.uuid,
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'Flags': self.flags,
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}
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}
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def get_path(self):
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return dbus.ObjectPath(self.path)
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@dbus.service.method(DBUS_PROP_IFACE,
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in_signature='s',
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out_signature='a{sv}')
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def GetAll(self, interface):
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if interface != GATT_DESC_IFACE:
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raise InvalidArgsException()
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return self.get_properties()[GATT_DESC_IFACE]
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@dbus.service.method(GATT_DESC_IFACE, in_signature='a{sv}', out_signature='ay')
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def ReadValue(self, options):
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print('Default ReadValue called, returning error')
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raise NotSupportedException()
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@dbus.service.method(GATT_DESC_IFACE, in_signature='aya{sv}')
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def WriteValue(self, value, options):
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print('Default WriteValue called, returning error')
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raise NotSupportedException()
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@dbus.service.signal(DBUS_PROP_IFACE,
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signature='sa{sv}as')
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def PropertiesChanged(self, interface, changed, invalidated):
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pass
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# print('\nProperties Changed')
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class AlertNotificationService(Service):
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def __init__(self, bus, index):
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Service.__init__(self, bus, index, SERVICE_UUIDS['ALERT_NOTIF_SVC_UUID'], primary=True)
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self.add_characteristic(SupportedNewAlertCategoryCharacteristic(bus, '0001', self))
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self.add_characteristic(AlertNotificationControlPointCharacteristic(bus, '0002', self))
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self.add_characteristic(UnreadAlertStatusCharacteristic(bus, '0003', self))
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def get_char_status(self, uuid, status):
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for char in self.characteristics:
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if char.uuid == uuid:
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if status in char.status:
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return True
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return False
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class SupportedNewAlertCategoryCharacteristic(Characteristic):
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def __init__(self, bus, index, service):
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Characteristic.__init__(
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self, bus, index,
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CHAR_UUIDS['SUPPORT_NEW_ALERT_UUID'],
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['read'],
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service)
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self.value = [dbus.Byte(2)]
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self.status = []
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def ReadValue(self, options):
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val_list = []
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for val in self.value:
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val_list.append(dbus.Byte(val))
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print('Read Request received\n', '\tSupportedNewAlertCategoryCharacteristic')
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print('\tValue:', '\t', val_list)
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self.status.append('read')
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return val_list
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class AlertNotificationControlPointCharacteristic(Characteristic):
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def __init__(self, bus, index, service):
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Characteristic.__init__(
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self, bus, index,
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CHAR_UUIDS['ALERT_NOTIF_UUID'],
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['read', 'write'],
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service)
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self.value = [dbus.Byte(0)]
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self.status = []
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def ReadValue(self, options):
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val_list = []
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for val in self.value:
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val_list.append(dbus.Byte(val))
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print('Read Request received\n', '\tAlertNotificationControlPointCharacteristic')
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print('\tValue:', '\t', val_list)
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self.status.append('read')
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return val_list
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def WriteValue(self, value, options):
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print('Write Request received\n', '\tAlertNotificationControlPointCharacteristic')
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print('\tCurrent value:', '\t', self.value)
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val_list = []
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for val in value:
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val_list.append(val)
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self.value = val_list
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self.PropertiesChanged(GATT_CHRC_IFACE, {'Value': self.value}, [])
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# Check if new value is written
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print('\tNew value:', '\t', self.value)
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if not self.value == value:
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print('Failed: Write Request\n\tNew value not written\tCurrent value:', self.value)
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self.status.append('write')
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class UnreadAlertStatusCharacteristic(Characteristic):
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def __init__(self, bus, index, service):
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Characteristic.__init__(
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self, bus, index,
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CHAR_UUIDS['UNREAD_ALERT_STATUS_UUID'],
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['read', 'write', 'notify'],
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service)
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self.value = [dbus.Byte(0)]
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self.cccd_obj = ClientCharacteristicConfigurationDescriptor(bus, '0001', self)
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self.add_descriptor(self.cccd_obj)
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self.notifying = False
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self.status = []
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def StartNotify(self):
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try:
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if self.notifying:
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print('\nAlready notifying, nothing to do')
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return
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print('Notify Started')
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self.notifying = True
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self.ReadValue()
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self.WriteValue([dbus.Byte(1), dbus.Byte(0)])
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self.status.append('notify')
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except Exception as e:
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print(e)
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def StopNotify(self):
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if not self.notifying:
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print('\nNot notifying, nothing to do')
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return
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self.notifying = False
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print('\nNotify Stopped')
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def ReadValue(self, options=None):
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val_list = []
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for val in self.value:
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val_list.append(dbus.Byte(val))
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self.status.append('read')
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print('\tValue:', '\t', val_list)
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return val_list
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def WriteValue(self, value, options=None):
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val_list = []
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for val in value:
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val_list.append(val)
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self.value = val_list
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self.PropertiesChanged(GATT_CHRC_IFACE, {'Value': self.value}, [])
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# Check if new value is written
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if not self.value == value:
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print('Failed: Write Request\n\tNew value not written\tCurrent value:', self.value)
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print('New value:', '\t', self.value)
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self.status.append('write')
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class ClientCharacteristicConfigurationDescriptor(Descriptor):
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def __init__(self, bus, index, characteristic):
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self.value = [dbus.Byte(1)]
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Descriptor.__init__(
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self, bus, index,
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DESCR_UUIDS['CCCD_UUID'],
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['read', 'write'],
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characteristic)
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def ReadValue(self, options=None):
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return self.value
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def WriteValue(self, value, options=None):
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val_list = []
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for val in value:
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val_list.append(val)
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self.value = val_list
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self.PropertiesChanged(GATT_DESC_IFACE, {'Value': self.value}, [])
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# Check if new value is written
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if not self.value == value:
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print('Failed: Write Request\n\tNew value not written\tCurrent value:', self.value)
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