Try to look in ths thread, where I try to describe how to setup a similar remote USB multimedia remote for Volumio - #6 by raev
Hope it helps 
Personally I have no experience with Bluetooth remotes.
Try to look in ths thread, where I try to describe how to setup a similar remote USB multimedia remote for Volumio - #6 by raev
Hope it helps
Personally I have no experience with Bluetooth remotes.