If you've already got a nice collection of HATs and other GPIO add-ons for your previous Raspberry Pi boards, you might be wondering if they will work with Raspberry Pi 5.
Whilst the way the IO is handled is different with Raspberry Pi 5, GPIO pins and connected devices should work the same way.
PoE HATs designed for the Raspberry Pi 4/3B+ will not work with Raspberry Pi 5, as the 4-pin PoE header has been moved.
In their Pi 5 testing, Raspberry Pi couldn't find a HAT that didn't work as expected, however please raise a forum post in the relevant section if you discover issues using your HAT with Raspberry Pi 5.