I can't take credit for this, read most of the mod somewhere else, possibly on this forum.
But the Airwick Essential Oil diffusers run on battery. They have schedules built in for when they go off that are very limiting. BUT, the important part is after getting power, about 15 seconds later they do an initial burst.
So if you are daring, you can take an unused AC to DC adapter outlet, strip the wires, connect to where the batteries should go, then plug that into a smart outlet. Turn the smart outlet on for about 25 seconds with an immediate off after and you'll get one burst.
The mod I read had purchased fake batteries online that you put in a device and then power the fake batteries thru USB. I'm sure there are many options for wiring a battery powered device.
Just to be clear, I do not suggest you do this nor do I take any liability for any issues you cause by doing this.
