/// <summary>
/// This method wraps the traditional scan, but waits for the centralManager to be ready before initiating scan
/// </summary>
/// <param name="centralManager">The centralManager to scan with</param>
/// <param name="restart">Stops any current scan running</param>
/// <param name="config">ScanConfig parameters you would like to use</param>
/// <returns></returns>
public static IObservable <IScanResult> Scan(this ICentralManager centralManager, ScanConfig?config = null, bool restart = false)
{
if (restart && centralManager.IsScanning)
{
centralManager.StopScan(); // need a pause to wait for scan to end
}
return(centralManager.Scan(config));
}
private void ScanToggleAsync()
{
if (this.IsScanning)
{
this.IsScanning = false;
this._scan?.Dispose();
}
else
{
this.Peripherals.Clear();
Debug.WriteLine("View" + Thread.CurrentThread.ManagedThreadId);
this._scan = _centralManager
.Scan()
.Buffer(TimeSpan.FromSeconds(1))
.Synchronize()
.ObserveOn(XamarinDispatcherScheduler.Current)
.Subscribe(
results =>
{
//Debug.WriteLine("within: " + Thread.CurrentThread.ManagedThreadId);
var list = new List <PeripheralItemViewModel>();
foreach (var result in results)
{
var peripheral = this.Peripherals.FirstOrDefault(x => x.Equals(result.Peripheral));
if (peripheral == null)
{
peripheral = list.FirstOrDefault(x => x.Equals(result.Peripheral));
}
if (peripheral != null)
{
peripheral.Update(result);
}
else
{
peripheral = new PeripheralItemViewModel(result.Peripheral);
peripheral.Update(result);
list.Add(peripheral);
}
}
foreach (var per in list)
{
this.Peripherals.Add(per);
}
RaisePropertyChanged(nameof(Peripherals));
},
ex => Console.WriteLine("ERROR: " + ex.ToString())
)
.DisposeWith(this.DeactivateWith);
this.IsScanning = true;
}
RaisePropertyChanged(nameof(Peripherals));
RaisePropertyChanged(nameof(IsScanning));
}
/// <summary> /// Scans only for distinct peripherals instead of repeating each peripheral scan response - this will only give you peripherals, not RSSI or ad packets /// </summary> /// <param name="centralManager"></param> /// <param name="config"></param> /// <returns></returns> public static IObservable <IPeripheral> ScanForUniquePeripherals(this ICentralManager centralManager, ScanConfig?config = null) => centralManager .Scan(config) .Distinct(x => x.Peripheral.Uuid) .Select(x => x.Peripheral);
/// <summary>
/// This will scan until the peripheral a specific peripheral is found, then cancel the scan
/// </summary>
/// <param name="centralManager"></param>
/// <param name="peripheralName"></param>
/// <param name="includeLocalName"></param>
/// <returns></returns>
public static IObservable <IPeripheral> ScanUntilPeripheralFound(this ICentralManager centralManager, string peripheralName, bool includeLocalName = true) => centralManager
.Scan()
.Where(x =>
x.Peripheral.Name?.Equals(peripheralName, StringComparison.OrdinalIgnoreCase) ?? false ||
(includeLocalName && (x.AdvertisementData?.LocalName?.Equals(peripheralName, StringComparison.InvariantCultureIgnoreCase) ?? false))
)
.Take(1)
.Select(x => x.Peripheral);
/// <summary> /// This will scan until the peripheral a specific peripheral is found, then cancel the scan /// </summary> /// <param name="centralManager"></param> /// <param name="peripheralUuid"></param> /// <returns></returns> public static IObservable <IPeripheral> ScanUntilPeripheralFound(this ICentralManager centralManager, Guid peripheralUuid) => centralManager .Scan() .Where(x => x.Peripheral.Uuid.Equals(peripheralUuid)) .Take(1) .Select(x => x.Peripheral);
public AdapterViewModel(ICentralManager central,
INavigationService navigator,
IUserDialogs dialogs)
{
this.CanControlAdapterState = central.CanControlAdapterState();
this.WhenAnyValue(x => x.SelectedPeripheral)
.Skip(1)
.Where(x => x != null)
.SubOnMainThread(x => navigator.Navigate("Peripheral", ("Peripheral", x.Peripheral)));
this.ToggleAdapterState = ReactiveCommand.Create(
() =>
{
var poweredOn = central.Status == AccessState.Available;
if (!central.TrySetAdapterState(!poweredOn))
{
dialogs.Alert("Cannot change bluetooth adapter state");
}
}
);
this.ScanToggle = ReactiveCommand.Create(
() =>
{
if (this.IsScanning)
{
this.IsScanning = false;
this.scan?.Dispose();
}
else
{
this.Peripherals.Clear();
this.scan = central
.Scan()
.Buffer(TimeSpan.FromSeconds(1))
.Synchronize()
.SubOnMainThread(
results =>
{
var list = new List <PeripheralItemViewModel>();
foreach (var result in results)
{
var peripheral = this.Peripherals.FirstOrDefault(x => x.Equals(result.Peripheral));
if (peripheral == null)
{
peripheral = list.FirstOrDefault(x => x.Equals(result.Peripheral));
}
if (peripheral != null)
{
peripheral.Update(result);
}
else
{
peripheral = new PeripheralItemViewModel(result.Peripheral);
peripheral.Update(result);
list.Add(peripheral);
}
}
if (list.Any())
{
this.Peripherals.AddRange(list);
}
},
ex => dialogs.Alert(ex.ToString(), "ERROR")
)
.DisposeWith(this.DeactivateWith);
this.IsScanning = true;
}
}
);
}
/// <summary>
/// Scan for heart rate sensors. Note that a lot of heart rate sensors do not advertise their service UUID
/// </summary>
/// <param name="adapter"></param>
/// <returns></returns>
public static IObservable <IScanResult> ScanForHeartRateSensors(this ICentralManager centralManager) => centralManager.Scan(new ScanConfig
{
ServiceUuids =
{
HeartRateServiceUuid
}
});
public AdapterViewModel(ICentralManager central,
INavigationService navigationService,
IUserDialogs dialogs)
{
this.SelectPeripheral = ReactiveCommand.CreateFromTask <ScanResultViewModel>(
x => navigationService.Navigate(
"Peripheral",
("Peripheral", x.Peripheral)
)
);
this.OpenSettings = ReactiveCommand.Create(() =>
{
if (central.Features.HasFlag(BleFeatures.OpenSettings))
{
central.OpenSettings();
}
else
{
dialogs.Alert("Cannot open bluetooth settings");
}
});
this.ToggleAdapterState = ReactiveCommand.Create(
() =>
{
if (central.CanControlAdapterState())
{
var poweredOn = central.Status == AccessState.Available;
central.SetAdapterState(!poweredOn);
}
else
{
dialogs.Alert("Cannot change bluetooth adapter state");
}
}
);
this.ScanToggle = ReactiveCommand.Create(
() =>
{
if (this.IsScanning)
{
this.scan?.Dispose();
}
else
{
this.Peripherals.Clear();
this.scan = central
.Scan()
.Buffer(TimeSpan.FromSeconds(1))
.Synchronize()
.SubOnMainThread(
results =>
{
var list = new List <ScanResultViewModel>();
foreach (var result in results)
{
var dev = this.Peripherals.FirstOrDefault(x => x.Uuid.Equals(result.Peripheral.Uuid));
if (dev != null)
{
dev.TrySet(result);
}
else
{
dev = new ScanResultViewModel();
dev.TrySet(result);
list.Add(dev);
}
}
if (list.Any())
{
this.Peripherals.AddRange(list);
}
},
ex => dialogs.Alert(ex.ToString(), "ERROR")
)
.DisposeWith(this.DeactivateWith);
}
}
);
}
public static IObservable <Beacon> ScanForBeacons(this ICentralManager centralManager) => centralManager .Scan() .Where(x => x.IsBeacon()) .Select(x => x.ToBeacon());
/// <summary> /// This will scan until the peripheral a specific peripheral is found, then cancel the scan /// </summary> /// <param name="centralManager"></param> /// <param name="deviceName"></param> /// <returns></returns> public static IObservable <IPeripheral> ScanUntilPeripheralFound(this ICentralManager centralManager, string deviceName) => centralManager .Scan() .Where(x => x.Peripheral.Name?.Equals(deviceName, StringComparison.OrdinalIgnoreCase) ?? false) .Take(1) .Select(x => x.Peripheral);
public static IObservable <Beacon> ScanForBeacons(this ICentralManager centralManager, bool forMonitoring = false) => centralManager
.Scan(new ScanConfig
{
//AndroidUseScanBatching = true,
ScanType = forMonitoring
? BleScanType.LowPowered
: BleScanType.Balanced
})
.Where(x => x.IsBeacon())
.Select(x => x.AdvertisementData.ManufacturerData.Data.Parse(x.Rssi));
