网页^(Web)可以通过网络蓝牙 API^{(Web Bluetooth API)}从配对设备直接通信。因此，您可以使用此技术与附近的蓝牙设备^{(nearby Bluetooth devices)}进行通信，而不是下载移动应用程序并使其与设备同步。然而，并不是所有的浏览器都兼容网络蓝牙^{(Web Bluetooth)}。像Microsoft Edge一样，可以让您轻松访问 USB 设备^{(access a USB device)}。这是一个简短的教程，描述了如何在 Edge 中控制 Web 蓝牙 API^{(Web Bluetooth API in Edge)}的使用。

^(Control)在Edge浏览器中控制Web 蓝牙 API^{(Web Bluetooth API)}的使用

Microsoft Edge浏览器允许其用户根据URL模式定义站点列表，这些站点可以要求用户访问USB设备。如果您不配置此策略，则用户的个人配置将用于所有站点，或者使用 DefaultWebUsbGuardSetting 策略中的全局默认值。

1. 打开注册表编辑器。
2. 转到 MicrosoftEdge 密钥
3. 双击DefaultWebUsbGuardSetting条目。
4. 输入^(Enter)值 2 以不允许任何站点通过WebUSB API请求访问^{(WebUSB API)}USB设备。
5. 将值更改为 3 以允许站点要求用户授予对连接的USB设备的访问权限。
6. 关闭注册表编辑器。
7. 重新启动您的电脑。

请^(Please)注意，该方法涉及对注册表编辑器^{(Registry Editor)}进行更改。如果您不正确地更改注册表编辑器，可能会发生严重的更改。^{(Registry Editor)}在继续之前创建一个系统还原点。

Press Win+R打开“运行”^(Run)对话框。

^{(Type Regedit)}在框的空白字段中键入 Regedit ，然后按 Enter^(Enter)键。

当注册表编辑器^{(Registry Editor)}打开时，导航到以下路径地址 -

HKEY_LOCAL_MACHINE\ Software\Policies\Microsoft\Edge.

在右窗格中，双击DefaultWebUsbGuardSetting条目。如果该条目不存在，则需要创建一个.

当Edit String框出现时，输入值2以阻止或阻止任何站点通过⁽²⁾WebUSB API请求访问USB设备。

同样，要允许站点要求用户授予对连接的USB设备的访问权限，请将值从 2 更改为3。

完成后，关闭注册表编辑器^{(Registry Editor)}并退出。

重新启动您的 PC 以使更改生效。

供您参考，用于映射控制使用 Web 蓝牙 API设置的^{(Control use of the Web Bluetooth API)}组策略^{(Group Policy)}选项如下：

• BlockWebBluetooth (2) = 不允许任何站点通过Web 蓝牙 API请求访问^{(Web Bluetooth API)}蓝牙^(Bluetooth)设备
• AskWebBluetooth (3) =允许^(Allow)网站要求用户授予对附近蓝牙^(Bluetooth)设备的访问权限

希望有帮助！

How to control use of the Web Bluetooth API in Microsoft Edge

Web pages can communicаte directly from a paired device via Web Bluetooth API. So, instead of downloading a mobile app and having it sync with devices, you can use this technology for communicating with nearby Bluetooth devices. However, not all browsers are compatible with Web Bluetooth yet. The ones that are, like Microsoft Edge, allow you to easily access a USB device. Here’s a short tutorial describing how to control the use of Web Bluetooth API in Edge.

Control use of Web Bluetooth API in Edge browser

Microsoft Edge browser allows its users to define a list of sites, based on URL patterns, that can ask the user for access to a USB device. If you don’t configure this policy, the user’s personal configuration is used for all sites or the global default value from the DefaultWebUsbGuardSetting policy is used.

1. Open Registry Editor.
2. Go to the Microsoft\Edge key
3. Double-click DefaultWebUsbGuardSetting entry.
4. Enter the value 2 to not allow any site to request access to USB devices via the WebUSB API.
5. Change the value to 3 to allow sites to ask the user to grant access to a connected USB device.
6. Close the Registry Editor.
7. Restart your PC.

Please note that the method involves making changes to the Registry Editor. Serious changes can occur if you make changes to the Registry Editor incorrectly. Create a System Restore point before proceeding further.

Press Win+R in combination to open the Run dialog box.

Type Regedit in the empty field of the box and hit Enter key.

When the Registry Editor opens, navigate to the following path address –

HKEY_LOCAL_MACHINE\ Software\Policies\Microsoft\Edge.

In the right-pane, double-click the DefaultWebUsbGuardSetting entry. If the entry doesn’t exist, you’ll need to create one.

When the Edit String box appears, enter the value 2 to block or prevent any site to request access to USB devices via the WebUSB API.

Similarly, to allow sites to ask the user to grant access to a connected USB device, change the value from 2 to 3.

When done, close the Registry Editor and exit.

Restart your PC to allow the changes to take effect.

For your information, the Group Policy options for mapping Control use of the Web Bluetooth API setting are as follows:

• BlockWebBluetooth (2) = Do not allow any site to request access to Bluetooth devices via the Web Bluetooth API
• AskWebBluetooth (3) = Allow sites to ask the user to grant access to a nearby Bluetooth device

Hope that helps!

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