HAT vs pHAT vs wHAT

Discussion Raspberry Pi
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I know what a HAT is but what is a wHAT or a pHAT. Is it something to do with size?

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So the HAT specification is written by the Raspberry Pi team, and you have to do certain things to call your product a HAT (officially, anyway).

There’s no official specification for a Pi Zero-sized addon, so Pimoroni created their own pHAT term (might be partial hats?), whereas Adafruit uses terms like Bonnets for add-ons which are that size.

wHAT I think is just “wide-HAT”, a Pimoroni thing.

So pHAT and wHAT are unofficial terms for differently sized addons the Pi company hasn’t created anything official for.

EDIT: It looks like the newer HAT+ specification is less choosy about HAT size, so technically something Pi Zero-sized could officially be a HAT+ if it complied with the other requirements.

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