我使用DeviceWatcher获取UWP应用中配对蓝牙设备的DeviceInformation。我像这样设置了DeviceWatcher
var requestedProperties = new string[] { "System.Devices.Aep.DeviceAddress", "System.Devices.Aep.IsConnected" };
var deviceWatcher = DeviceInformation.CreateWatcher("(System.Devices.Aep.ProtocolId:=\"{e0cbf06c-cd8b-4647-bb8a-263b43f0f974}\")", requestedProperties, DeviceInformationKind.AssociationEndpoint); // ClassGuid = {e0cbf06c-cd8b-4647-bb8a-263b43f0f974} includes all Bluetooth devices
deviceWatcher.Added += DeviceWatcher_Added;
deviceWatcher.Updated += DeviceWatcher_Updated;
deviceWatcher.Start();
当调用DeviceWatcher_Added事件处理程序时,我通过检查设备名称来检查设备是否是我感兴趣的设备,并提供RfcommServiceId.SerialPort.Uuid服务。
一旦我拥有蓝牙设备的DeviceInformation,我感兴趣的是如何获得它的COM端口?我可以在设备管理器中看到它,它被列为"标准串口通过蓝牙链接(COM8)",但我看不出如何得到它" COM8"在UWP中以编程方式。
我已经尝试将DeviceInformation设置为SerialDevice,然后我可以获得SerialDevice.PortName(cf this answer)但我对SerialDevice.FromIdAsync(deviceInfo.Id)
的调用因System.Exception而失败:数据无效。
(N.B。一些诱人的答案,如this和this,使用Windows Management Intrumentation WMI函数,但这些函数在UWP中不可用。)
答案 0 :(得分:3)
在another question Rita建议查看Serial UART sample,这有助于我找到一种方法。我不会将此标记为一段时间的答案,因为它似乎过于间接而不是规范的方式。
虽然我的UWP应用中的配对蓝牙设备有DeviceInformation,但我还需要SerialDevice的列表,以便我可以匹配它们。这是结果代码。
public async Task<string> ComPort(DeviceInformation deviceInfo)
{
var serialDevices = new Dictionary<string, SerialDevice>();
var serialSelector = SerialDevice.GetDeviceSelector();
var serialDeviceInformations = (await DeviceInformation.FindAllAsync(serialSelector)).ToList();
var hostNames = NetworkInformation.GetHostNames().Select(hostName => hostName.DisplayName.ToUpper()).ToList(); // So we can ignore inbuilt ports
foreach (var serialDeviceInformation in serialDeviceInformations)
{
if (hostNames.FirstOrDefault(hostName => hostName.StartsWith(serialDeviceInformation.Name.ToUpper())) == null)
{
try
{
var serialDevice = await SerialDevice.FromIdAsync(serialDeviceInformation.Id);
if (serialDevice != null)
{
serialDevices.Add(deviceInfo.Id, serialDevice);
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.ToString());
}
}
}
// Example Bluetooth DeviceInfo.Id: "Bluetooth#Bluetooth9c:b6:d0:d6:d7:56-00:07:80:cb:56:6d"
// from device with Association Endpoint Address: "00:07:80:cb:56:6d"
var lengthOfTrailingAssociationEndpointAddresss = (2 * 6) + 5;
var bluetoothDeviceAddress = deviceInfo.Id.Substring(deviceInfo.Id.Length - lengthOfTrailingAssociationEndpointAddresss, lengthOfTrailingAssociationEndpointAddresss).Replace(":", "").ToUpper();
var matchingKey = serialDevices.Keys.FirstOrDefault(id => id.Contains(bluetoothDeviceAddress));
if (matchingKey != null)
{
return serialDevices[matchingKey].PortName;
}
return "";
}