" the LED bulb screws into a fixture with the wifi stuff inside"
I would also think that the electronics could be small enough to simply be an insert between one of the conductors and the bulb. There are, for example, inserts (size of a coin iirc) that simply can flash a bulb when seated in between the screwbase and the bulb.
I would also think that the electronics could be small enough to simply be an insert between one of the conductors and the bulb. There are, for example, inserts (size of a coin iirc) that simply can flash a bulb when seated in between the screwbase and the bulb.