           </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <a class="link" href="serial_port/is_open.html" title="serial_port::is_open"><span class="bold"><strong>is_open</strong></span></a>
                </p>
              </td>
<td>
                <p>
                  Determine whether the serial port is open.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <a class="link" href="serial_port/lowest_layer.html" title="serial_p