Unless I miss my mark, the PoE HAT powers the Pi through the GPIO header. It also requires a PoE capable network switch on the other end of the cable. Most domestic routers and switches don't support that.
Powering via the GPIO header is not significantly more dangerous. Just use two 5v pins and two ground pins and make sure you have thick wires ("standard" dupont jumpers are too thin for the current).
The problem you'll hit is that as the Pi5 cannot negotiate with the PSU it will refuse to boot from a USB device without manual confirmation and will restrict total current to bus powered downstream USB devices to 600mA.
You can override that in config.txt or the bootloader EEPROM config (search the forum for more on that).
Powering via the GPIO header is not significantly more dangerous. Just use two 5v pins and two ground pins and make sure you have thick wires ("standard" dupont jumpers are too thin for the current).
The problem you'll hit is that as the Pi5 cannot negotiate with the PSU it will refuse to boot from a USB device without manual confirmation and will restrict total current to bus powered downstream USB devices to 600mA.
You can override that in config.txt or the bootloader EEPROM config (search the forum for more on that).
Statistics: Posted by thagrol — Thu Mar 13, 2025 5:04 pm