private async Task WriteAttributeAsync(byte connection, ushort handle, byte[] value)
{
var writeTCS = new TaskCompletionSource <bool>();
var onProcedureCompleted = new EventHandler <ProcedureCompletedEventArgs>((s, e) =>
{
if (e.Connection != connection || e.ChrHandle != handle)
{
return;
}
if (e.ErrorCode == 0)
{
writeTCS.TrySetResult(true);
}
else
{
var error = new SDK.ErrorException(e.ErrorCode);
writeTCS.TrySetException(error);
}
});
_messageHub.AttributeClient.ProcedureCompleted += onProcedureCompleted;
try
{
await _messageHub.AttributeClient.AttributeWriteAsync(connection, handle, value);
await writeTCS.Task;
}
finally
{
_messageHub.AttributeClient.ProcedureCompleted += onProcedureCompleted;
}
}
public async Task ConfigAsync(GattCharacteristic characteristic, GattCharacteristicSettings settings)
{
var connection = characteristic.Connection;
var itemsTCS = new TaskCompletionSource <IList <FindInformationFoundEventArgs> >();
var items = new List <FindInformationFoundEventArgs>();
var onFindInformationFound = new EventHandler <FindInformationFoundEventArgs>((s, e) =>
{
if (e.Connection != connection)
{
return;
}
items.Add(e);
});
var onProcedureCompleted = new EventHandler <ProcedureCompletedEventArgs>((s, e) =>
{
if (e.Connection != connection)
{
return;
}
if (e.ErrorCode == 0)
{
itemsTCS.TrySetResult(items);
}
else
{
var error = new SDK.ErrorException(e.ErrorCode);
itemsTCS.TrySetException(error);
}
});
_messageHub.AttributeClient.FindInformationFound += onFindInformationFound;
_messageHub.AttributeClient.ProcedureCompleted += onProcedureCompleted;
try
{
var start = characteristic.Start;
var end = characteristic.End;
await _messageHub.AttributeClient.FindInformationAsync(connection, start, end);
await itemsTCS.Task;
}
finally
{
_messageHub.AttributeClient.FindInformationFound -= onFindInformationFound;
_messageHub.AttributeClient.ProcedureCompleted -= onProcedureCompleted;
}
var item = items.First(i =>
{
var uuid = BitConverter.ToUInt16(i.UUID, 0);
return(uuid == 0x2902);
});
var handle = item.ChrHandle;
var settingsValue = (ushort)settings;
var value = BitConverter.GetBytes(settingsValue);
await _messageHub.AttributeClient.WriteCommandAsync(connection, handle, value);
}