Have you considered setting up an IFTTT channel for handling the enter/exit events?
Regarding the room events getting sent to to custom endpoint via the external link. Is there a way to send to a LAN address instead of public IP? Also is there a future plan to query a sensor for the people currently in the room? This way something like a time trigger for smart devices could work but only if people are in the room. Awesome product, just getting it set up. Now I just need some smart devices..