public override IObservable <ScanResult> Scan(ScanConfig config)
{
if (this.IsScanning)
{
throw new ArgumentException("There is already an active scan");
}
this.isScanning = true;
return(this.context
.Scan(config ?? new ScanConfig())
.Finally(() => this.isScanning = false));
}
public override IObservable <ScanResult> Scan(ScanConfig config)
{
config = config ?? new ScanConfig();
if (this.IsScanning)
{
throw new ArgumentException("There is already an existing scan");
}
//if (config.ScanType == BleScanType.Background && (config.ServiceUuids == null || config.ServiceUuids.Count == 0))
// throw new ArgumentException("Background scan type set but not ServiceUUID");
this.context.Clear();
return(this.context
.Manager
.WhenReady()
.Select(_ => Observable.Create <ScanResult>(ob =>
{
var scan = this.context
.ScanResultReceived
.AsObservable()
.Subscribe(ob.OnNext);
if (config.ServiceUuids == null || config.ServiceUuids.Count == 0)
{
this.context.Manager.ScanForPeripherals(null, new PeripheralScanningOptions {
AllowDuplicatesKey = true
});
}
else
{
var uuids = config.ServiceUuids.Select(o => o.ToCBUuid()).ToArray();
this.context.Manager.ScanForPeripherals(uuids, new PeripheralScanningOptions {
AllowDuplicatesKey = true
});
}
return () =>
{
this.context.Manager.StopScan();
scan.Dispose();
};
}))
.Switch());
}
IObservable <BluetoothLEAdvertisementReceivedEventArgs> CreateScanner(ScanConfig config)
=> Observable.Create <BluetoothLEAdvertisementReceivedEventArgs>(ob =>
{
this.context.Clear();
config = config ?? new ScanConfig {
ScanType = BleScanType.Balanced
};
var adWatcher = new BluetoothLEAdvertisementWatcher();
if (config.ServiceUuids != null)
{
foreach (var serviceUuid in config.ServiceUuids)
{
adWatcher.AdvertisementFilter.Advertisement.ServiceUuids.Add(serviceUuid);
}
}
switch (config.ScanType)
{
case BleScanType.Balanced:
adWatcher.ScanningMode = BluetoothLEScanningMode.Active;
break;
//case BleScanType.Background:
case BleScanType.LowLatency:
case BleScanType.LowPowered:
adWatcher.ScanningMode = BluetoothLEScanningMode.Passive;
break;
}
var handler = new TypedEventHandler <BluetoothLEAdvertisementWatcher, BluetoothLEAdvertisementReceivedEventArgs>
((sender, args) => ob.OnNext(args)
);
adWatcher.Received += handler;
adWatcher.Start();
return(() =>
{
adWatcher.Stop();
adWatcher.Received -= handler;
});
});
