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 <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 <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));
}));
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);
await Task.Delay(250, ct);
if (success)
{
var bytes = useIndicationsIfAvailable && this.CanIndicate()
? BluetoothGattDescriptor.EnableIndicationValue.ToArray()
: BluetoothGattDescriptor.EnableNotificationValue.ToArray();
await wrap.Write(bytes);
this.IsNotifying = true;
}
return(success);
});
