I have an existing home automation device using the open standard MQTT protocol. Will it be compatible with Nest? How to connect them?
In my opinion, if the Internet of Things wants to gain traction, it should be interoperable.
This would require a bridge daemon to run somewhere.
Answering my own question: Nest does not use the MQTT protocol out of the box, but there is a Nest-MQTT bridge using Node.js and Cyclon.js.