HowTo use the “long press” option of the Knob to call the context menu in Kodi?

Hello again,
is it possible to use the “long press”-option of the RNS-E Knob to call the context menu in Kodi ? This would be really usefull in order to extend the control of Kodi. Any ideas which CAN message ist send and how to extend the current plugin would be greatly appreciated.

Thank you and best regards,
Eric