public override IObservable <IGattDescriptor> WhenDescriptorDiscovered()
{
this.descriptorOb = this.descriptorOb ?? Observable.Create <IGattDescriptor>(ob =>
{
var descriptors = new Dictionary <Guid, IGattDescriptor>();
var handler = new EventHandler <CBCharacteristicEventArgs>((sender, args) =>
{
if (this.NativeCharacteristic.Descriptors == null)
{
return;
}
foreach (var dnative in this.NativeCharacteristic.Descriptors)
{
var wrap = new GattDescriptor(this, dnative);
if (!descriptors.ContainsKey(wrap.Uuid))
{
descriptors.Add(wrap.Uuid, wrap);
ob.OnNext(wrap);
}
}
});
this.Peripheral.DiscoveredDescriptor += handler;
this.Peripheral.DiscoverDescriptors(this.NativeCharacteristic);
return(() => this.Peripheral.DiscoveredDescriptor -= handler);
})
.Replay()
.RefCount();
return(this.descriptorOb);
}
public override IObservable <CharacteristicGattResult> EnableNotifications(bool useIndicationsIfAvailable)
=> this.context.Invoke(Observable.FromAsync(async ct =>
{
var descriptor = this.native.GetDescriptor(NotifyDescriptorId);
if (descriptor == null)
{
throw new BleException("Characteristic Client Configuration Descriptor not found");
}
var wrap = new GattDescriptor(this, this.context, descriptor);
if (!this.context.Gatt.SetCharacteristicNotification(this.native, true))
{
throw new BleException("Failed to set characteristic notification value");
}
await this.context.OpPause(ct).ConfigureAwait(false);
var bytes = useIndicationsIfAvailable && this.CanIndicate()
? BluetoothGattDescriptor.EnableIndicationValue.ToArray()
: BluetoothGattDescriptor.EnableNotificationValue.ToArray();
await wrap
.WriteInternal(bytes)
.ToTask(ct)
.ConfigureAwait(false);
this.IsNotifying = true;
return(new CharacteristicGattResult(this, null));
}));
// this should not be placed in a lock - let it fall to the descriptor
public override IObservable <bool> EnableNotifications(bool useIndicationsIfAvailable) => Observable.FromAsync(async ct =>
{
var descriptor = this.native.GetDescriptor(NotifyDescriptorId);
if (descriptor == null)
{
throw new ArgumentException("Characteristic Client Configuration Descriptor not found");
}
var wrap = new GattDescriptor(this, this.context, descriptor);
var success = this.context.Gatt.SetCharacteristicNotification(this.native, true);
if (CrossBleAdapter.AndroidOperationPause != null)
{
await Task.Delay(CrossBleAdapter.AndroidOperationPause.Value, ct);
}
if (success)
{
var bytes = useIndicationsIfAvailable && this.CanIndicate()
? BluetoothGattDescriptor.EnableIndicationValue.ToArray()
: BluetoothGattDescriptor.EnableNotificationValue.ToArray();
await wrap.Write(bytes);
this.IsNotifying = true;
}
return(success);
});
// this should not be placed in a lock - let it fall to the descriptor
public override IObservable <object> DisableNotifications() => Observable.FromAsync <object>(async ct =>
{
var descriptor = this.native.GetDescriptor(NotifyDescriptorId);
if (descriptor == null)
{
throw new ArgumentException("Characteristic Client Configuration Descriptor not found");
}
var wrap = new GattDescriptor(this, this.context, descriptor);
var success = this.context
.Gatt
.SetCharacteristicNotification(this.native, false);
if (CrossBleAdapter.AndroidOperationPause != null)
{
await Task.Delay(CrossBleAdapter.AndroidOperationPause.Value, ct);
}
if (success)
{
await wrap.Write(BluetoothGattDescriptor.DisableNotificationValue.ToArray());
this.IsNotifying = false;
}
return(null);
});
public override IObservable <IGattDescriptor> WhenDescriptorDiscovered() => Observable.Create <IGattDescriptor>(ob =>
{
// TODO: refresh per connection
foreach (var path in this.native.Descriptors)
{
var desc = Bus.System.GetObject <GattDescriptor1>(BlueZPath.Service, path);
var acr = new GattDescriptor(desc, this);
ob.OnNext(acr);
}
return(Disposable.Empty);
});
protected virtual async Task DisableNotifications()
{
var descriptor = this.native.GetDescriptor(NotifyDescriptorId);
if (descriptor == null)
{
throw new ArgumentException("Characteristic Client Configuration Descriptor not found");
}
var wrap = new GattDescriptor(this, this.context, descriptor);
await wrap.Write(BluetoothGattDescriptor.DisableNotificationValue.ToArray());
this.context.Gatt.SetCharacteristicNotification(this.native, false);
this.IsNotifying = false;
}
public override IObservable <IGattDescriptor> DiscoverDescriptors()
{
this.descriptorOb = this.descriptorOb ?? Observable.Create <IGattDescriptor>(ob =>
{
foreach (var nd in this.native.Descriptors)
{
var wrap = new GattDescriptor(this, this.context, nd);
ob.OnNext(wrap);
}
return(Disposable.Empty);
})
.Replay()
.RefCount();
return(this.descriptorOb);
}
public override IObservable <IGattDescriptor> WhenDescriptorDiscovered()
{
this.descriptorOb = this.descriptorOb ?? Observable.Create <IGattDescriptor>(async ob =>
{
var result = await this.Native.GetDescriptorsAsync(BluetoothCacheMode.Uncached);
//if (result.Status)
foreach (var dnative in result.Descriptors)
{
var descriptor = new GattDescriptor(dnative, this);
ob.OnNext(descriptor);
}
return(Disposable.Empty);
})
.Replay();
return(this.descriptorOb);
}
protected virtual async Task <bool> EnableNotifications()
{
var descriptor = this.native.GetDescriptor(NotifyDescriptorId);
if (descriptor == null)
{
throw new ArgumentException("Characteristic Client Configuration Descriptor not found");
}
var wrap = new GattDescriptor(this, this.context, descriptor);
var success = this.context.Gatt.SetCharacteristicNotification(this.native, true);
await Task.Delay(250);
if (success)
{
await wrap.Write(BluetoothGattDescriptor.EnableNotificationValue.ToArray());
this.IsNotifying = true;
}
return(success);
}
public override IObservable <bool> SetNotificationValue(CharacteristicConfigDescriptorValue value)
=> Observable.FromAsync(async ct =>
{
var enable = value != CharacteristicConfigDescriptorValue.None;
var descriptor = this.native.GetDescriptor(NotifyDescriptorId);
if (descriptor == null)
{
throw new ArgumentException("Characteristic Client Configuration Descriptor not found");
}
var wrap = new GattDescriptor(this, this.context, descriptor);
var success = this.context.Gatt.SetCharacteristicNotification(this.native, enable);
await Task.Delay(250, ct);
if (success)
{
await wrap.Write(GetDescriptionConfigBytes(value));
this.IsNotifying = enable;
}
return(success);
});
public override IObservable <CharacteristicGattResult> DisableNotifications()
=> this.context.Invoke(Observable.FromAsync(async ct =>
{
var descriptor = this.native.GetDescriptor(NotifyDescriptorId);
if (descriptor == null)
{
throw new BleException("Characteristic Client Configuration Descriptor not found");
}
var wrap = new GattDescriptor(this, this.context, descriptor);
if (!this.context.Gatt.SetCharacteristicNotification(this.native, false))
{
throw new BleException("Could not set characteristic notification value");
}
await this.context.OpPause(ct).ConfigureAwait(false);
await wrap
.WriteInternal(BluetoothGattDescriptor.DisableNotificationValue.ToArray())
.ToTask(ct)
.ConfigureAwait(false);
this.IsNotifying = false;
return(new CharacteristicGattResult(this, null));
}));
