Hi and welcome to the Bome community!
Not sure whether you want any C, D, and E to set the outgoing notes or only of a particular octave. Could you provide the note numbers as different venders may have different notes numbers for C#2 and C#3 because there is no MIDI standard for note name but numbers would be consistent.
Do you only want the translation to happen if the note is being held down or do you want it based on last note pressed?
Steve Caldwell
Bome Customer Care
Also available for paid consulting services: bome@sniz.biz