I have been looking for a library that can execute an ARP (Address Resolution Protocol) command to return a list of connected devices on the network. The idea is that it would send the request to the gateway and get a list of MAC addresses of currently connected devices as a sort of "who's home" request.
I have searched around Arduino's libraries and have not found any that specifically perform this type of functionality so I was hoping that maybe it was available in a function within a broader networking library.
The particular networking interface (wifi via ESP8266/ESP32 or Ethernet) does not matter as I have not chosen a specific board for the job yet. I'm interested in any library solution that would allow me to poll the gateway to see which devices are currently online without having to buy a special device like FingBox.
Any recommendations for a library that includes this functionality or an approach that would allow me to send ARP commands over the network?