我正在尝试在Bluez5上使用Python运行蓝牙设备。目前，我有以下内容：
#set up a bluez profile to advertise device capabilities from a loaded service record
def init_bluez_profile(self):
print("Configuring Bluez Profile")
#setup profile options
service_record=self.read_sdp_service_record()
opts = {
"ServiceRecord":service_record,
"Role":"server",
"RequireAuthentication":False,
"RequireAuthorization":False,
"Name":BTKbDevice.MY_DEV_NAME,
"AutoConnect":True
}
#retrieve a proxy for the bluez profile interface
bus = dbus.SystemBus()
self.manager = dbus.Interface(bus.get_object("org.bluez","/org/bluez"), "org.bluez.ProfileManager1")
self.profile = BTKbBluezProfile(bus, BTKbDevice.PROFILE_DBUS_PATH)
self.manager.RegisterProfile(BTKbDevice.PROFILE_DBUS_PATH, BTKbDevice.UUID, opts)
print("Profile registered ")
此代码正确执行，并且概要代码是bluez测试用例中的标准代码：
class BTKbBluezProfile(dbus.service.Object):
fd = -1
@dbus.service.method("org.bluez.Profile1",
in_signature="", out_signature="")
def Release(self):
print("Release")
mainloop.quit()
@dbus.service.method("org.bluez.Profile1",
in_signature="", out_signature="")
def Cancel(self):
print("Cancel")
@dbus.service.method("org.bluez.Profile1", in_signature="oha{sv}", out_signature="")
def NewConnection(self, path, fd, properties):
self.fd = fd.take()
print("NewConnection(%s, %d)" % (path, self.fd))
for key in properties.keys():
print ('key ' + key + ' value ' + properties[key])
if key == "Version" or key == "Features":
print(" %s = 0x%04x" % (key, properties[key]))
else:
print(" %s = %s" % (key, properties[key]))
@dbus.service.method("org.bluez.Profile1", in_signature="o", out_signature="")
def RequestDisconnection(self, path):
print("RequestDisconnection(%s)" % (path))
if (self.fd > 0):
os.close(self.fd)
self.fd = -1
def __init__(self, bus, path):
dbus.service.Object.__init__(self, bus, path)
但是，当我获得连接/断开连接时，没有任何效果。我尝试过各种选项，但是我什么都没注册。该文档很轻巧，在dbus通讯上我几乎看不到任何调试信息。是否有人成功注册了配置文件和/或获得了有关bluez交互的更多调试信息？
谢谢。
答案 0 :(得分：1)
这是成功的HID键盘实现，记录在： https://gist.github.com/ukBaz/a47e71e7b87fbc851b27cde7d1c0fcf0
"""
Bluetooth HID keyboard emulator DBUS Service
Original idea taken from:
http://yetanotherpointlesstechblog.blogspot.com/2016/04/emulating-bluetooth-keyboard-with.html
Moved to Python 3 and tested with BlueZ 5.43
Updates documented at:
https://gist.github.com/ukBaz/a47e71e7b87fbc851b27cde7d1c0fcf0
"""
import os
import sys
import dbus
import dbus.service
import socket
from gi.repository import GLib
from dbus.mainloop.glib import DBusGMainLoop
class HumanInterfaceDeviceProfile(dbus.service.Object):
"""
BlueZ D-Bus Profile for HID
"""
fd = -1
@dbus.service.method('org.bluez.Profile1',
in_signature='', out_signature='')
def Release(self):
print('Release')
mainloop.quit()
@dbus.service.method('org.bluez.Profile1',
in_signature='oha{sv}', out_signature='')
def NewConnection(self, path, fd, properties):
self.fd = fd.take()
print('NewConnection({}, {})'.format(path, self.fd))
for key in properties.keys():
if key == 'Version' or key == 'Features':
print(' {} = 0x{:04x}'.format(key,
properties[key]))
else:
print(' {} = {}'.format(key, properties[key]))
@dbus.service.method('org.bluez.Profile1',
in_signature='o', out_signature='')
def RequestDisconnection(self, path):
print('RequestDisconnection {}'.format(path))
if self.fd > 0:
os.close(self.fd)
self.fd = -1
class BTKbDevice:
"""
create a bluetooth device to emulate a HID keyboard
"""
MY_DEV_NAME = 'BT_HID_Keyboard'
# Service port - must match port configured in SDP record
P_CTRL = 17
# Service port - must match port configured in SDP record#Interrrupt port
P_INTR = 19
# BlueZ dbus
PROFILE_DBUS_PATH = '/bluez/yaptb/btkb_profile'
ADAPTER_IFACE = 'org.bluez.Adapter1'
DEVICE_INTERFACE = 'org.bluez.Device1'
DBUS_PROP_IFACE = 'org.freedesktop.DBus.Properties'
DBUS_OM_IFACE = 'org.freedesktop.DBus.ObjectManager'
# file path of the sdp record to laod
install_dir = os.path.dirname(os.path.realpath(__file__))
SDP_RECORD_PATH = os.path.join(install_dir,
'sdp_record.xml')
# UUID for HID service (1124)
# https://www.bluetooth.com/specifications/assigned-numbers/service-discovery
UUID = '00001124-0000-1000-8000-00805f9b34fb'
def __init__(self, hci=0):
self.scontrol = None
self.ccontrol = None # Socket object for control
self.sinterrupt = None
self.cinterrupt = None # Socket object for interrupt
self.dev_path = '/org/bluez/hci{}'.format(hci)
print('Setting up BT device')
self.bus = dbus.SystemBus()
self.adapter_methods = dbus.Interface(
self.bus.get_object('org.bluez',
self.dev_path),
self.ADAPTER_IFACE)
self.adapter_property = dbus.Interface(
self.bus.get_object('org.bluez',
self.dev_path),
self.DBUS_PROP_IFACE)
self.bus.add_signal_receiver(self.interfaces_added,
dbus_interface=self.DBUS_OM_IFACE,
signal_name='InterfacesAdded')
self.bus.add_signal_receiver(self._properties_changed,
dbus_interface=self.DBUS_PROP_IFACE,
signal_name='PropertiesChanged',
arg0=self.DEVICE_INTERFACE,
path_keyword='path')
print('Configuring for name {}'.format(BTKbDevice.MY_DEV_NAME))
self.config_hid_profile()
# set the Bluetooth device configuration
self.alias = BTKbDevice.MY_DEV_NAME
self.discoverabletimeout = 0
self.discoverable = True
def interfaces_added(self):
pass
def _properties_changed(self, interface, changed, invalidated, path):
if self.on_disconnect is not None:
if 'Connected' in changed:
if not changed['Connected']:
self.on_disconnect()
def on_disconnect(self):
print('The client has been disconnect')
self.listen()
@property
def address(self):
"""Return the adapter MAC address."""
return self.adapter_property.Get(self.ADAPTER_IFACE,
'Address')
@property
def powered(self):
"""
power state of the Adapter.
"""
return self.adapter_property.Get(self.ADAPTER_IFACE, 'Powered')
@powered.setter
def powered(self, new_state):
self.adapter_property.Set(self.ADAPTER_IFACE, 'Powered', new_state)
@property
def alias(self):
return self.adapter_property.Get(self.ADAPTER_IFACE,
'Alias')
@alias.setter
def alias(self, new_alias):
self.adapter_property.Set(self.ADAPTER_IFACE,
'Alias',
new_alias)
@property
def discoverabletimeout(self):
"""Discoverable timeout of the Adapter."""
return self.adapter_props.Get(self.ADAPTER_IFACE,
'DiscoverableTimeout')
@discoverabletimeout.setter
def discoverabletimeout(self, new_timeout):
self.adapter_property.Set(self.ADAPTER_IFACE,
'DiscoverableTimeout',
dbus.UInt32(new_timeout))
@property
def discoverable(self):
"""Discoverable state of the Adapter."""
return self.adapter_props.Get(
self.ADAPTER_INTERFACE, 'Discoverable')
@discoverable.setter
def discoverable(self, new_state):
self.adapter_property.Set(self.ADAPTER_IFACE,
'Discoverable',
new_state)
def config_hid_profile(self):
"""
Setup and register HID Profile
"""
print('Configuring Bluez Profile')
service_record = self.read_sdp_service_record()
opts = {
'Role': 'server',
'RequireAuthentication': False,
'RequireAuthorization': False,
'AutoConnect': True,
'ServiceRecord': service_record,
}
manager = dbus.Interface(self.bus.get_object('org.bluez',
'/org/bluez'),
'org.bluez.ProfileManager1')
HumanInterfaceDeviceProfile(self.bus,
BTKbDevice.PROFILE_DBUS_PATH)
manager.RegisterProfile(BTKbDevice.PROFILE_DBUS_PATH,
BTKbDevice.UUID,
opts)
print('Profile registered ')
@staticmethod
def read_sdp_service_record():
"""
Read and return SDP record from a file
:return: (string) SDP record
"""
print('Reading service record')
try:
fh = open(BTKbDevice.SDP_RECORD_PATH, 'r')
except OSError:
sys.exit('Could not open the sdp record. Exiting...')
return fh.read()
def listen(self):
"""
Listen for connections coming from HID client
"""
print('Waiting for connections')
self.scontrol = socket.socket(socket.AF_BLUETOOTH,
socket.SOCK_SEQPACKET,
socket.BTPROTO_L2CAP)
self.scontrol.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
self.sinterrupt = socket.socket(socket.AF_BLUETOOTH,
socket.SOCK_SEQPACKET,
socket.BTPROTO_L2CAP)
self.sinterrupt.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
self.scontrol.bind((self.address, self.P_CTRL))
self.sinterrupt.bind((self.address, self.P_INTR))
# Start listening on the server sockets
self.scontrol.listen(1) # Limit of 1 connection
self.sinterrupt.listen(1)
self.ccontrol, cinfo = self.scontrol.accept()
print('{} connected on the control socket'.format(cinfo[0]))
self.cinterrupt, cinfo = self.sinterrupt.accept()
print('{} connected on the interrupt channel'.format(cinfo[0]))
def send(self, msg):
"""
Send HID message
:param msg: (bytes) HID packet to send
"""
self.cinterrupt.send(bytes(bytearray(msg)))
class BTKbService(dbus.service.Object):
"""
Setup of a D-Bus service to recieve HID messages from other
processes.
Send the recieved HID messages to the Bluetooth HID server to send
"""
def __init__(self):
print('Setting up service')
bus_name = dbus.service.BusName('org.yaptb.btkbservice',
bus=dbus.SystemBus())
dbus.service.Object.__init__(self, bus_name, '/org/yaptb/btkbservice')
# create and setup our device
self.device = BTKbDevice()
# start listening for socket connections
self.device.listen()
@dbus.service.method('org.yaptb.btkbservice',
in_signature='ay')
def send_keys(self, cmd):
self.device.send(cmd)
if __name__ == '__main__':
# The sockets require root permission
if not os.geteuid() == 0:
sys.exit('Only root can run this script')
DBusGMainLoop(set_as_default=True)
myservice = BTKbService()
mainloop = GLib.MainLoop()
mainloop.run()
'sdp_record.xml'
<?xml version="1.0" encoding="UTF-8" ?>
<record>
<attribute id="0x0001">
<sequence>
<uuid value="0x1124" />
</sequence>
</attribute>
<attribute id="0x0004">
<sequence>
<sequence>
<uuid value="0x0100" />
<uint16 value="0x0011" />
</sequence>
<sequence>
<uuid value="0x0011" />
</sequence>
</sequence>
</attribute>
<attribute id="0x0005">
<sequence>
<uuid value="0x1002" />
</sequence>
</attribute>
<attribute id="0x0006">
<sequence>
<uint16 value="0x656e" />
<uint16 value="0x006a" />
<uint16 value="0x0100" />
</sequence>
</attribute>
<attribute id="0x0009">
<sequence>
<sequence>
<uuid value="0x1124" />
<uint16 value="0x0100" />
</sequence>
</sequence>
</attribute>
<attribute id="0x000d">
<sequence>
<sequence>
<sequence>
<uuid value="0x0100" />
<uint16 value="0x0013" />
</sequence>
<sequence>
<uuid value="0x0011" />
</sequence>
</sequence>
</sequence>
</attribute>
<attribute id="0x0100">
<text value="Raspberry Pi Virtual Keyboard" />
</attribute>
<attribute id="0x0101">
<text value="USB > BT Keyboard" />
</attribute>
<attribute id="0x0102">
<text value="Raspberry Pi" />
</attribute>
<attribute id="0x0200">
<uint16 value="0x0100" />
</attribute>
<attribute id="0x0201">
<uint16 value="0x0111" />
</attribute>
<attribute id="0x0202">
<uint8 value="0x40" />
</attribute>
<attribute id="0x0203">
<uint8 value="0x00" />
</attribute>
<attribute id="0x0204">
<boolean value="false" />
</attribute>
<attribute id="0x0205">
<boolean value="false" />
</attribute>
<attribute id="0x0206">
<sequence>
<sequence>
<uint8 value="0x22" />
<text encoding="hex" value="05010906a101850175019508050719e029e715002501810295017508810395057501050819012905910295017503910395067508150026ff000507190029ff8100c0050c0901a1018503150025017501950b0a23020a21020ab10109b809b609cd09b509e209ea09e9093081029501750d8103c0" />
</sequence>
</sequence>
</attribute>
<attribute id="0x0207">
<sequence>
<sequence>
<uint16 value="0x0409" />
<uint16 value="0x0100" />
</sequence>
</sequence>
</attribute>
<attribute id="0x020b">
<uint16 value="0x0100" />
</attribute>
<attribute id="0x020c">
<uint16 value="0x0c80" />
</attribute>
<attribute id="0x020d">
<boolean value="true" />
</attribute>
<attribute id="0x020e">
<boolean value="false" />
</attribute>
<attribute id="0x020f">
<uint16 value="0x0640" />
</attribute>
<attribute id="0x0210">
<uint16 value="0x0320" />
</attribute>
</record>