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Re:COAP endpoints on IKEA Trådfri by SEJeff on Monday April 10, 2017 @09:29AM (#14078311)
Aaaaand home assistant can "emulate" the hue bridge to integrate them all seamlessly:

https://home-assistant.io/components/emulated_hue/

Re:COAP endpoints on IKEA Trådfri by georgehotelling on Monday April 10, 2017 @10:43AM (#14078862)
The Hue Bridge connects an IP network to a ZigBee network. That component emulates the IP side: it accepts IP commands for lights and translates them to Home Assistant devices. That's handy if you have something like an Amazon Echo that knows how to communicate via Hue's IP protocol.

What I believe you are describing would require a ZigBee radio and support for the ZigBee Light Link protocol (or maybe ZigBee Home Automation?). Luckily, there's a PR being worked on to support that in Home Assistant: https://github.com/home-assistant/home-assistant/pull/6263