Hi all!
We make small project for Arduino based on old D-Link 24 ports switch case.
We remove old PCB from that case and develop new one for Arduino. In future we plan build own case for that PCB.
First 2 ports for connect device to ethernet and external display like Nextion.
Each next Ethernet port connected with 2 digital/analog port on Arduino and have 5V and GND for easy connect additional sensors.
![enter image title here enter image description here](https://www.openhardware.io//uploads/5d9b0edbc4d8b9270c5ba52e/image/ArduinoARDHUB.png)