在 Linux 上用 Python 列出附近/可发现的蓝牙设备，包括已经配对 [英] List nearby/discoverable bluetooth devices, including already paired, in Python, on Linux

问题描述

我正在尝试在 Linux 上使用 Python 列出所有附近/可发现的蓝牙设备，包括那些已经配对的.

I'm trying to list all nearby/discoverable bluetooth devices, including those already paired, using Python on Linux.

我知道如何使用设备的地址列出设备的服务，并且可以成功连接:

I know how to list services for a device using its address, and can connect successfully:

services = bluetooth.find_service(address='...')

阅读 PyBluez 文档，如果我不指定任何条件，我希望附近的任何设备都能显示:

Reading the PyBluez docs I would expect any nearby device to show up if I don't specify any criteria:

如果未指定条件，则返回检测到的所有附近服务的列表."

"If no criteria are specified, then returns a list of all nearby services detected."

我现在唯一"需要的是能够列出已经配对的设备，无论它们是否打开、关闭、在附近.很像我在 Ubuntu/Unity 中的所有设置 --> 蓝牙中得到的列表.

The "only" thing I need right now is to be able to list already paired devices, whether they are on, off, nearby or not. Much like the list I'm getting in All Settings --> Bluetooth in Ubuntu/Unity.

顺便说一句，以下不会列出我机器上已经配对的设备，即使它们在/附近.可能是因为它们一旦配对就无法发现:

Btw, the following does not list already paired devices on my machine, even if they are on/nearby. Probably because they are not discoverable once paired:

import bluetooth
for d in bluetooth.discover_devices(flush_cache=True):
    print d

有什么想法...?

我找到并安装了bluez-tools".

I found and installed "bluez-tools".

bt-device --list

... 提供我需要的信息，即添加设备的地址.

... gives me the information I need, i.e. addresses of added devices.

我检查了 C 源代码，发现这可能不像我想象的那么容易.

I've checked the C source, found out that this might not be as easy as I thought it would be.

仍然不知道如何在 Python 中执行此操作...

Still don't know how to do this in Python ...

我认为 DBUS 可能是我应该阅读的内容.看起来够复杂的.如果有人有一些代码可以分享，我会非常高兴.:)

I think DBUS might be what I should be reading up on. Seems complicated enough. If anyone has got some code to share I would be really happy. :)

推荐答案

自从蓝牙 API 第 5 版采用以来，@Micke 解决方案中使用的大部分功能都被删除了，并且交互与总线发生通过 ObjectManager.GetManagedObjects [1]

Since the adoption of the version 5 of the Bluetooth API most of the functions used in the @Micke solutions were dropped and the interaction with the bus take place throught the ObjectManager.GetManagedObjects [1]

import dbus


def proxyobj(bus, path, interface):
    """ commodity to apply an interface to a proxy object """
    obj = bus.get_object('org.bluez', path)
    return dbus.Interface(obj, interface)


def filter_by_interface(objects, interface_name):
    """ filters the objects based on their support
        for the specified interface """
    result = []
    for path in objects.keys():
        interfaces = objects[path]
        for interface in interfaces.keys():
            if interface == interface_name:
                result.append(path)
    return result


bus = dbus.SystemBus()

# we need a dbus object manager
manager = proxyobj(bus, "/", "org.freedesktop.DBus.ObjectManager")
objects = manager.GetManagedObjects()

# once we get the objects we have to pick the bluetooth devices.
# They support the org.bluez.Device1 interface
devices = filter_by_interface(objects, "org.bluez.Device1")

# now we are ready to get the informations we need
bt_devices = []
for device in devices:
    obj = proxyobj(bus, device, 'org.freedesktop.DBus.Properties')
    bt_devices.append({
        "name": str(obj.Get("org.bluez.Device1", "Name")),
        "addr": str(obj.Get("org.bluez.Device1", "Address"))
    })  

在 bt_device 列表中有包含所需数据的字典:即

In the bt_device list there are dictionaries with the desired data: ie

例如

[{
    'name': 'BBC micro:bit [zigiz]', 
    'addr': 'E0:7C:62:5A:B1:8C'
 }, {
    'name': 'BBC micro:bit [putup]',
    'addr': 'FC:CC:69:48:5B:32'
}]

参考:[1] http://www.bluez.org/bluez-5-api-introduction-and-porting-guide/

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