Hi, It is possible to power the ESP32 at the same time by poe and usb for a long time?
If you are using ESP32-PoE-ISO you can have both USB and PoE connected and enabled at the same time for as long as you want. The powering will be taken from the PoE, and if you disconnect the PoE, the power would be taken from the USB.
This is not the case with ESP32-PoE (only the ISO version is safe to have both methods of powering connected at the same time).