protected static async Task <IDevice1?> ScanAndConnectInternal(ScanFilter filter,
TimeSpan?timeout = null,
string?adapter = null)
{
// Default value
if (timeout == null)
{
timeout = TimeSpan.FromSeconds(10);
}
try
{
IAdapter1?a;
if (adapter == null)
{
var adapters = await BlueZManager.GetAdaptersAsync();
if (adapters.Count == 0)
{
Log.Error("No Bluetooth adapters found.");
throw new BleDeviceError("No Bluetooth adapters found.");
}
a = adapters.First();
}
else
{
a = await BlueZManager.GetAdapterAsync(adapter);
}
var adapterPath = a.ObjectPath.ToString();
var adapterName = adapterPath.Substring(adapterPath.LastIndexOf("/", StringComparison.Ordinal) + 1);
Log.Debug($"Using Bluetooth Adapter {adapterName}.");
var devices = await a.GetDevicesAsync();
foreach (var device in devices)
{
var properties = await device.GetAllAsync();
var deviceDescription = await GetDeviceDescriptionAsync(device, properties);
Log.Debug(deviceDescription);
if (await CheckAndConnect(filter, device))
{
return(device);
}
}
Log.Debug($"{devices.Count} device(s) found ahead of scan.");
// Scan for more devices.
Log.Debug($"Scanning for {timeout.Value.Seconds} seconds...");
IDevice1?device1 = null;
var tokenSource = new CancellationTokenSource();
using (await a.WatchDevicesAddedAsync(async device =>
{
var deviceProperties = await device.GetAllAsync();
var deviceDescription = await GetDeviceDescriptionAsync(device, deviceProperties);
Log.Debug($"[NEW] {deviceDescription}");
if (!await CheckAndConnect(filter, device))
{
return;
}
device1 = device;
Log.Debug("Stopping scan...");
tokenSource.Cancel();
}))
{
Log.Debug("Starting scanning...");
await a.StartDiscoveryAsync();
await Task.Delay(TimeSpan.FromSeconds(timeout.Value.Seconds), tokenSource.Token);
await a.StopDiscoveryAsync();
Log.Debug("Scan complete.");
}
if (device1 != null)
{
return(device1);
}
Log.Warning("Device not found.");
}
catch (Tmds.DBus.DBusException e)
{
Log.Warning($"Error: {e.ErrorMessage}.");
}
return(null);
}
