Fun fact! EVs use powerline networking for vehicle<->charger communication. Since multiple chargers and cars might share the same circuit (and L2 network), in

Fun fact! EVs use powerline networking for vehicle<->charger communication. Since multiple chargers and cars might share the same circuit (and L2 network), in order to identify the connected car's network endpoint, they've invented a "sounding" protocol to determine the physically closest network node based on signal strength. Read ISO 15118 for more details. Here's a paper where they built a sniffer and explore the protocol: https://www.sstic.org/media/SSTIC2019/SSTIC-actes/v2g_injector_playing_with_electric_cars_and_chargi/SSTIC2019-Article-v2g_injector_playing_with_electric_cars_and_charging_stations_via_powerline-dudek.pdf https://www.sstic.org/media/SSTIC2019/SSTIC-actes/v2g_inject...