The ornamental design for a smartaromadiffuser/humidifier, as shown and described.
FIG. 1 is a front and top perspective view of a smart aroma diffuser/humidifier, showing my new design;
FIG. 2 is a rear and bottom perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof.
The broken lines in the figures illustrate portions of the smart aroma diffuser/humidifier that form no part of the claimed design. Further, the dash-dot broken line defines the boundary of the the claimed design.