Although not using PJON addresses as IP addresses, PJON has a few strategies that allow a PJON bus to span a Ethernet+WiFi LAN and/or WAN. I use this in my PJO

Although not using PJON addresses as IP addresses, PJON has a few strategies that allow a PJON bus to span a Ethernet+WiFi LAN and/or WAN. I use this in my PJON-based home automation system using clusters of SoftwareBitBang based devices (a bus on a single wire plus ground), linking these clusters together and with the master with routers using the DualUDP strategy over my LAN. PJON is great for cases like this. It could easily cross the Internet as well but in that case I would recommend using site-to-site VPN commections for security as the PJON traffic is not encrypted (encryption is a little too heavy when running on limited devices like Arduino). I have shared my PJON-based automation library here for those interested: https://github.com/fredilarsen/ModuleInterface https://github.com/fredilarsen/ModuleInterface