The app that Scott Keuster wrote utilizes Home Controller used on HA. He recently added websocket support to the insteon-server node app. So exactly what you're describing is possible. @cwwilson08 has been working on a driver, but I'm sure contributions are welcome. There's an error that hasn't been resolved yet. It's very close and we'll have contacts, motion sensors, and leak sensors, We already have dimmers and switches.
I've come to rely on this completely. It's rock solid. Super fast and I get to keep all of the great hardware features of the Insteon products. Only thing you need the Insteon cloud for with the 2245 hub, is devices setup. After that, it can go offline and it doesn't matter at all. All your devices operate super fast with HE locally. I'm very happy with this setup. Looking forward to the input sensor capabilities.
