使用 gatt 协议的 Windows 10 蓝牙通信

Question

我有多个需要与之通信的 BLE 设备。如何连接到特定设备并与之通信？

在 Windows 10 中，似乎没有连接方法。

谢谢

Answer 1

我认为它尚不可用。您需要等到周年纪念更新（希望如此）。在 Windows 开发人员反馈用户语音页面上查看此内容https://wpdev.uservoice.com/forums/110705-universal-windows-platform/suggestions/7176829-gatt-server-api

GATT 服务器 API 将在该更新中提供给开发者，敬请期待

他指出了 Build 2016 中显示的更新，即周年更新

Answer 2

目前，Windows 只能是 GATT 客户端；但是，它仍然可以读写作为 GATT 服务器的 BLE 设备。在 Windows 10 中连接到 BLE 设备有几个步骤。

权限

首先，确保您设置了正确的功能。转到 Package.appxmanifest，Capabilities 选项卡，然后打开蓝牙。

Package.appxmanifest > Capabilities > Turn on Bluetooth

查找 BLE 设备

重要提示。目前，Windows 10 不支持连接到 未配对的 BLE 设备。您必须在设置页面中配对设备， 或使用应用内配对 API。

知道设备已配对，有几种方法可以找到 BLE 设备。您可以按 Appearance、BluetoothAddress、ConnectionStatus、DeviceName 或 PairingState 查找。找到您要查找的设备后，您可以使用它的 ID 连接到它。下面是通过名称查找设备的示例：

string deviceSelector = BluetoothLEDevice.GetDeviceSelectorFromDeviceName("SOME_NAME");
var devices = await DeviceInformation.FindAllAsync(deviceSelector);

// Choose which device you want, name it yourDevice

BluetoothLEDevice device = await BluetoothLEDevice.FromIdAsync(yourDevice.Id);

FromIdAsync 方法是 Windows 连接到 BLE 设备的地方。

沟通

您可以通过以下方式读取和写入设备上的特征。

// First get the characteristic you're interested in    
var characteristicId = new Guid("SOME_GUID");
var serviceId = new Guid("SOME_GUID");
var service = device.GetGattService(serviceId);
var characterstic = service.GetCharacteristics(characteristicId)[0];

// Read from the characteristic
GattReadResult result = await characterstic.ReadValueAsync(BluetoothCacheMode.Uncached);
byte[] data = (result.Value.ToArray());

// Write to the characteristic
DataWriter writer = new DataWriter();
byte[] data = SOME_DATA;
writer.WriteBytes(data);
GattCommunicationStatus status = await characteristic.WriteValueAsync(writer.DetachBuffer());