#AskFedi: If I was looking for a very small microcontroller (think like less than 5x5 mm), I would guess there are things that exist, right? Any pointers / suggestions?

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@crypticcelery 1 I/O or more?
@RueNahcMohr Ideally a couple, if possible (not sure what is reasonable in this footprint).
@crypticcelery @RueNahcMohr digikey/mouser let you filter by footprint, maybe even size

@ozeng @crypticcelery

well do you want more than 4 IO?