<option value='ttyUSB1' $selected{'COMPORT'}{'ttyUSB1'}>ttyUSB1</option>
<option value='ttyUSB2' $selected{'COMPORT'}{'ttyUSB2'}>ttyUSB2</option>
<option value='ttyUSB3' $selected{'COMPORT'}{'ttyUSB3'}>ttyUSB3</option>
<option value='ttyUSB1' $selected{'COMPORT'}{'ttyUSB1'}>ttyUSB1</option>
<option value='ttyUSB2' $selected{'COMPORT'}{'ttyUSB2'}>ttyUSB2</option>
<option value='ttyUSB3' $selected{'COMPORT'}{'ttyUSB3'}>ttyUSB3</option>