private async Task StartSearch()
{
bool result = await RequestPermissions <LocationAlwaysPermission>();
if (!result)
{
return;
}
ToggleIsSearching(true);
_searching = _manager.Scan().Subscribe(scanResult =>
{
Device.BeginInvokeOnMainThread(() =>
{
if (!_cache.ContainsKey(scanResult.Peripheral.Uuid))
{
_cache.Add(scanResult.Peripheral.Uuid, scanResult.Peripheral);
Devices.Add(scanResult.Peripheral);
}
else
{
_cache[scanResult.Peripheral.Uuid] = scanResult.Peripheral;
var device = Devices.First(d => d.Uuid == scanResult.Peripheral.Uuid);
device = scanResult.Peripheral;
}
});
});
}
/// <summary>
/// This method wraps the traditional scan, but waits for the bleManager to be ready before initiating scan
/// </summary>
/// <param name="bleManager">The bleManager 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 <ScanResult> Scan(this IBleManager bleManager, ScanConfig?config = null, bool restart = false)
{
if (restart && bleManager.IsScanning)
{
bleManager.StopScan(); // need a pause to wait for scan to end
}
return(bleManager.Scan(config));
}
public ScanViewModel(IBleManager bleManager)
{
this.Start = ReactiveCommand.CreateFromTask(async() =>
{
bleManager
//.ScanForUniquePeripherals() // this gives you the peripheral, not the scan results
.Scan()
.SubOnMainThread(result =>
// scan results duplicate per device as the RSSI and device name is read/changed
this.Results.Add(result)
);
});
this.Stop = ReactiveCommand.Create(() => bleManager.StopScan());
}
public static IObservable <Beacon> ScanForBeacons(this IBleManager manager, BeaconMonitorConfig?config)
{
var scanType = config == null
? BleScanType.LowLatency
: BleScanType.LowPowered;
var cfg = new ScanConfig {
ScanType = scanType
};
if (config?.ScanServiceUuids?.Any() ?? false)
{
cfg.ServiceUuids = config.ScanServiceUuids;
}
return(manager
.Scan(cfg)
.Where(x => x.IsBeacon())
.Select(x => x.AdvertisementData.ManufacturerData.Data.Parse(x.Rssi)));
}
/// <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="bleManager"></param> /// <param name="config"></param> /// <returns></returns> public static IObservable <IPeripheral> ScanForUniquePeripherals(this IBleManager bleManager, ScanConfig?config = null) => bleManager .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="bleManager"></param>
/// <param name="peripheralName"></param>
/// <param name="includeLocalName"></param>
/// <returns></returns>
public static IObservable <IPeripheral> ScanUntilPeripheralFound(this IBleManager bleManager, string peripheralName, bool includeLocalName = true) => bleManager
.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="bleManager"></param> /// <param name="peripheralUuid"></param> /// <returns></returns> public static IObservable <IPeripheral> ScanUntilPeripheralFound(this IBleManager bleManager, Guid peripheralUuid) => bleManager .Scan() .Where(x => x.Peripheral.Uuid.Equals(peripheralUuid)) .Take(1) .Select(x => x.Peripheral);
public static IObservable <Beacon> ScanForBeacons(this IBleManager manager, bool forMonitoring = false) => manager
.Scan(new ScanConfig
{
//AndroidUseScanBatching = true,
ScanType = forMonitoring
? BleScanType.LowPowered
: BleScanType.Balanced
//#if MONOANDROID
// , ServiceUuids = new List<string>
// {
// }
//#endif
})
.Where(x => x.IsBeacon())
.Select(x => x.AdvertisementData.ManufacturerData.Data.Parse(x.Rssi));
public AdapterViewModel(IBleManager central,
INavigationService navigator,
IDialogs 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.CreateFromTask(
async() =>
{
var poweredOn = central.Status == AccessState.Available;
if (!central.TrySetAdapterState(!poweredOn))
{
await 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>
/// This will scan until the peripheral a specific peripheral is found, then cancel the scan
/// </summary>
/// <param name="bleManager"></param>
/// <param name="peripheralName"></param>
/// <returns></returns>
public static IObservable <IPeripheral> ScanUntilPeripheralFound(this IBleManager bleManager, string peripheralName) => bleManager
.Scan()
.Where(scanResult =>
{
if (scanResult.Peripheral.Name?.Equals(peripheralName, StringComparison.InvariantCultureIgnoreCase) ?? false)
{
return(true);
}
if (scanResult.AdvertisementData?.LocalName?.Equals(peripheralName, StringComparison.CurrentCultureIgnoreCase) ?? false)
{
return(true);
}
return(false);
})
.Take(1)
.Select(x => x.Peripheral);