Recently, we had a discussion in Berlin how we can use PoE (Power-over-Ethernet) and weatherproof Ethernet cables for powering e.g. small board with Micro-USB or “Arduino plug”. I have found some hardware PoE Splitter with MicroUSB Plug-5V 802.3af PoE Output Data & Power Splitter - 5/9/12V 802.3a…

Using Power-over-Ethernet (PoE)

Andreas November 4, 2018, 12:36am 5

This lovely piece seems to fit well here:

Using the ESP32 with wired Ethernet