RIBBON_2010.xml

<customUI xmlns="http://schemas.microsoft.com/office/2009/07/customui">
 <ribbon>
  <tabs>
   <tab      id="COM_PORT_TAB"      label="COM Port 1"         insertAfterMso="TabHome">

    <group   id="COM_PORT_CONTROLS" label="COM Port Control">
     <button id="COM_PORT_START"    label="Start" size="large" onAction="COM_PORT_CONTROL_1" imageMso="RecordingPlay"/>
     <button id="COM_PORT_STOP"     label="Stop"  size="large" onAction="COM_PORT_CONTROL_2" imageMso="MenuDeclineInvitation"/>
    </group>

    <group   id="COM_PORT_DATA"     label="COM Port Data">
     <button id="COM_PORT_CHECK"    label="Check" size="large" onAction="COM_PORT_DATA_1"    imageMso="NewTaskNumbered"/>
     <button id="COM_PORT_READ"     label="Read"  size="large" onAction="COM_PORT_DATA_2"    imageMso="BarcodeInsert"/>
     <button id="COM_PORT_WRITE"    label="Write" size="large" onAction="COM_PORT_DATA_3"    imageMso="PageOptionsDialog"/>
    </group>

    <group   id="COM_PORT_SIGNAL"   label="Request to Send">
     <button id="COM_PORT_RTS_ON"   label="On"    size="large" onAction="COM_PORT_SIGNAL_1"  imageMso="ArrangeByToDoStart"/>
     <button id="COM_PORT_RTS_OFF"  label="Off"   size="large" onAction="COM_PORT_SIGNAL_2"  imageMso="HtmlClearBookmarks"/>
    </group>

   </tab>
  </tabs>
 </ribbon>
</customUI>