private void buTeclas_KeyPress(object sender, KeyPressEventArgs e)
        {
            //Eventos para controlar la pulsaciĆ³n de las teclas
            if (e.KeyChar == (char)Keys.W)
            {
                serialPort1.Write("w");

                TxWindows.Clear();
            }
            if (e.KeyChar == (char)Keys.A)
            {
                serialPort1.Write("d");
                TxWindows.Clear();
            }
            if (e.KeyChar == (char)Keys.S)
            {
                //MessageBox.Show("S");
                serialPort1.Write("s");
                TxWindows.Clear();
            }
            if (e.KeyChar == (char)Keys.D)
            {
                // MessageBox.Show("D");
                serialPort1.Write("a");

                TxWindows.Clear();
            }
        }
        private void btnSend_Click(object sender, EventArgs e)
        {
            string tx = TxWindows.Text;

            serialPort1.Write(tx);
            //serialPort1.Close();
            TxWindows.Clear();
        }
 private void buTeclas_KeyUp(object sender, KeyEventArgs e)
 {
     serialPort1.Write("p");
     TxWindows.Clear();
 }