Dear Fiio, can you also ask your engineers to make one important improvement?
Now with single device connection mode a double short-click of a "Power" button works like Play/Pause, it mapped as consistency:
code 127 (KEYCODE_MEDIA_PAUSE)
code 126 (KEYCODE_MEDIA_PLAY)
And it is completely useless for this button assignment in single device connection mode.
It will be very good and correctly to assign this "Power" button to the following:
single short-click of a "Power" button - code 87 (KEYCODE_MEDIA_NEXT)
double short-click of a "Power" button - code 88 (KEYCODE_MEDIA_PREVIOUS)
Then it would be very convenient to control the switching of tracks, holding BTR3 in hand with a cable hanging down from the fist.
If the doubleclick cannot be changed due to compatibility with multiconnection mode, then at least one single short-click assignment for KEYCODE_MEDIA_NEXT can greatly improve usability.
Who agree, join the request!