I'm looking for something that actually acts as the hub for a Zigbee network, doesn't talk to an existing hub (e.g. a SmartThings or Philip Hue hub) and does useful things like bridging the Zigbee network to some IP-based protocol that allows querying/listening to/changing state, providing caching/persistence of network/device state, etc.

The closest thing I've found in the wild is Home Assistant's Zigbee module, but it seems a bit misnamed since it seems to talk only from one XBee device to another, and not supporting, for example, the Zigbee HA profile.

My current best plan is to get an XBee device (this and this to be specific, the s2c part is important) and write a daemon (talking to the XBee device over serial) to do what I describe above.

Is there anything like this already out there? If not, is there a proprietary protocol (for the IP side) that is worth good enough to emulate? (i.e. the SmartThings api -- which I have not looked at all at). Does this seem worth it?

The advantages of this I can see:

• You own your own data and it doesn't have to pass through the cloud (although I believe I've read SmartThings can now work offline, to what extent I don't know).
• You can add support for weird/quirky devices and fix bugs yourself, since it's open source.
• It's cheaper (the SmartThings hub is $100 and the dongle is $50 total).

Aside: Nest's Thread (i.e. using standard IPv6 UDP) becoming common would be super nice...