private void service_CommandReceived(object sender, BluetoothCommandResponseEventArgs e)
{
string command = e.Command;
Data = command;
e.Response = _commands.TryGetValue(command, out var response) ? response : "ERR:COMMAND_UNKNOWN";
}
void OnCommandReceived(BluetoothCommandResponseEventArgs args)
{
EventHandler <BluetoothCommandResponseEventArgs> ev = CommandReceived;
ev?.Invoke(this, args);
}
/// <summary>
/// Listeners the accept bluetooth client.
/// </summary>
/// <param name="token">
/// The token.
/// </param>
private async Task Listener(CancellationTokenSource token)
{
try
{
while (true)
{
if (token.IsCancellationRequested)
{
return;
}
// Are we still listening for a client
if (_client == null)
{
_client = _listener.AcceptBluetoothClient();
_stream = _client.GetStream();
}
// If we have a client see if there is new data
if (_client != null && _stream != null)
{
Debug.WriteLine($"Client connected = true");
while (true)
{
if (token.IsCancellationRequested)
{
return;
}
if (_stream.DataAvailable)
{
Debug.WriteLine("Data Available");
byte[] readBuffer = new byte[1024];
int bytesRead = await _stream.ReadAsync(readBuffer, 0, readBuffer.Length);
string command = System.Text.Encoding.ASCII.GetString(readBuffer, 0, bytesRead);
if (!string.IsNullOrEmpty(command))
{
Debug.WriteLine($"Command received: {command}");
BluetoothCommandResponseEventArgs args = new BluetoothCommandResponseEventArgs()
{
Command = command
};
OnCommandReceived(args);
Debug.WriteLine($"Sending response: {args.Response}");
var writeBuffer = Encoding.UTF8.GetBytes(args.Response);
await _stream.WriteAsync(writeBuffer, 0, writeBuffer.Length);
}
}
else
{
Thread.Sleep(200);
}
}
}
}
}
catch (Exception ex)
{
// todo handle the exception
// for the sample it will be ignored
Debug.WriteLine($"Exception thrown: {ex.Message}");
}
}