我正在使用Bluez 5.50 example-advertisement与我从example-gatt-server编辑的自定义服务器一起使用。效果很好，但是我想减少广告间隔，即增加广告频率。
大多数在线可用帮助都在使用hcitool，例如here。我阅读了有关广告包的详细信息，并且应该根据here所描述的蓝牙核心规范的补充内容，将间隔设置为所描述的值。但是，当我尝试将其添加到广告的属性时，会出现解析错误。由于我不熟悉python和dbus，因此不确定如何进行此操作。 我在下面附上我的广告代码。我在代码中需要的位置添加了set_advInterval部分。
`#!/usr/bin/python
from __future__ import print_function
import dbus
import dbus.exceptions
import dbus.mainloop.glib
import dbus.service
import array
try:
from gi.repository import GObject # python3
except ImportError:
import gobject as GObject # python2
from random import randint
mainloop = None
BLUEZ_SERVICE_NAME = 'org.bluez'
LE_ADVERTISING_MANAGER_IFACE = 'org.bluez.LEAdvertisingManager1'
DBUS_OM_IFACE = 'org.freedesktop.DBus.ObjectManager'
DBUS_PROP_IFACE = 'org.freedesktop.DBus.Properties'
LE_ADVERTISEMENT_IFACE = 'org.bluez.LEAdvertisement1'
class InvalidArgsException(dbus.exceptions.DBusException):
_dbus_error_name = 'org.freedesktop.DBus.Error.InvalidArgs'
class NotSupportedException(dbus.exceptions.DBusException):
_dbus_error_name = 'org.bluez.Error.NotSupported'
class NotPermittedException(dbus.exceptions.DBusException):
_dbus_error_name = 'org.bluez.Error.NotPermitted'
class InvalidValueLengthException(dbus.exceptions.DBusException):
_dbus_error_name = 'org.bluez.Error.InvalidValueLength'
class FailedException(dbus.exceptions.DBusException):
_dbus_error_name = 'org.bluez.Error.Failed'
class Advertisement(dbus.service.Object):
PATH_BASE = '/org/bluez/example/advertisement'
def __init__(self, bus, index, advertising_type):
self.path = self.PATH_BASE + str(index)
self.bus = bus
self.ad_type = advertising_type
self.service_uuids = None
self.manufacturer_data = None
self.solicit_uuids = None
self.service_data = None
self.local_name = None
self.include_tx_power = None
self.data = None
self.advInterval=None
dbus.service.Object.__init__(self, bus, self.path)
def get_properties(self):
properties = dict()
properties['Type'] = self.ad_type
if self.service_uuids is not None:
properties['ServiceUUIDs'] = dbus.Array(self.service_uuids,
signature='s')
if self.solicit_uuids is not None:
properties['SolicitUUIDs'] = dbus.Array(self.solicit_uuids,
signature='s')
if self.manufacturer_data is not None:
properties['ManufacturerData'] = dbus.Dictionary(
self.manufacturer_data, signature='qv')
if self.service_data is not None:
properties['ServiceData'] = dbus.Dictionary(self.service_data,
signature='sv')
if self.local_name is not None:
properties['LocalName'] = dbus.String(self.local_name)
if self.include_tx_power is not None:
properties['IncludeTxPower'] = dbus.Boolean(self.include_tx_power)
if self.advInterval is not None:
properties['Interval']=dbus.Uint16(self.advInterval)
if self.data is not None:
properties['Data'] = dbus.Dictionary(
self.data, signature='yv')
return {LE_ADVERTISEMENT_IFACE: properties}
def get_path(self):
return dbus.ObjectPath(self.path)
def set_advInterval(self,interval):
self.advInterval=dbus.UInt16(interval)
def add_service_uuid(self, uuid):
if not self.service_uuids:
self.service_uuids = []
self.service_uuids.append(uuid)
def add_solicit_uuid(self, uuid):
if not self.solicit_uuids:
self.solicit_uuids = []
self.solicit_uuids.append(uuid)
def add_manufacturer_data(self, manuf_code, data):
if not self.manufacturer_data:
self.manufacturer_data = dbus.Dictionary({}, signature='qv')
self.manufacturer_data[manuf_code] = dbus.Array(data, signature='y')
def add_service_data(self, uuid, data):
if not self.service_data:
self.service_data = dbus.Dictionary({}, signature='sv')
self.service_data[uuid] = dbus.Array(data, signature='y')
def add_local_name(self, name):
if not self.local_name:
self.local_name = ""
self.local_name = dbus.String(name)
def add_data(self, ad_type, data):
if not self.data:
self.data = dbus.Dictionary({}, signature='yv')
self.data[ad_type] = dbus.Array(data, signature='y')
@dbus.service.method(DBUS_PROP_IFACE,
in_signature='s',
out_signature='a{sv}')
def GetAll(self, interface):
print('GetAll')
if interface != LE_ADVERTISEMENT_IFACE:
raise InvalidArgsException()
print('returning props')
return self.get_properties()[LE_ADVERTISEMENT_IFACE]
@dbus.service.method(LE_ADVERTISEMENT_IFACE,
in_signature='',
out_signature='')
def Release(self):
print('%s: Released!' % self.path)
class TestAdvertisement(Advertisement):
def __init__(self, bus, index):
Advertisement.__init__(self, bus, index, 'per
ipheral')
self.add_service_uuid('180F')
self.add_manufacturer_data(0xffff, [0x00, 0x01, 0x02, 0x03, 0x04])
self.add_service_data('9999', [0x00, 0x01, 0x02, 0x03, 0x04])
self.add_local_name('TestAdvertisement')
self.set_advInterval(0.2)
self.include_tx_power = True
self.add_data(0x26, [0x01, 0x01, 0x00])
def register_ad_cb():
print('Advertisement registered')
def register_ad_error_cb(error):
print('Failed to register advertisement: ' + str(error))
mainloop.quit()
def find_adapter(bus):
remote_om = dbus.Interface(bus.get_object(BLUEZ_SERVICE_NAME, '/'),
DBUS_OM_IFACE)
objects = remote_om.GetManagedObjects()
for o, props in objects.items():
if LE_ADVERTISING_MANAGER_IFACE in props:
return o
return None
def main():
global mainloop
dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
bus = dbus.SystemBus()
adapter = find_adapter(bus)
if not adapter:
print('LEAdvertisingManager1 interface not found')
return
adapter_props = dbus.Interface(bus.get_object(BLUEZ_SERVICE_NAME, adapter),
"org.freedesktop.DBus.Properties");
adapter_props.Set("org.bluez.Adapter1", "Powered", dbus.Boolean(1))
ad_manager = dbus.Interface(bus.get_object(BLUEZ_SERVICE_NAME, adapter),
LE_ADVERTISING_MANAGER_IFACE)
test_advertisement = TestAdvertisement(bus, 0)
mainloop = GObject.MainLoop()
ad_manager.RegisterAdvertisement(test_advertisement.get_path(), {},
reply_handler=register_ad_cb,
error_handler=register_ad_error_cb)
mainloop.run()
if __name__ == '__main__':
main()
`
答案 0 :(得分：0)
根据https://kernel.googlesource.com/pub/scm/bluetooth/bluez/+/5.50/doc/advertising-api.txt，广告界面api不具有属性“ Interval”。因此，我们无法通过该界面设置广告间隔。