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For questions regarding the use of Power Over Ethernet (IEEE802.3) on the Raspberry Pi.

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4 answers
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RPI 4 - POE enabled but requires hat?

Here in the tech specs it says "Power over Ethernet (PoE) enabled (requires separate PoE HAT)". What does it mean it's enabled, but it needs a separate hat. … The RPI 3 could be powered with POE using a hat, what makes this any different? …
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