CoAP is very compelling, here is the spec: http://tools.ietf.org/html/rfc7252

Cool that it maps to HTTP / REST so you can proxy it to the web. All the tricks it gets from UDP + TURN ICE STUN are p2p friendly.

Same here. Feels like a mix of OSC (Open Sound Control) and HTTP. As with OSC it runs over UDP, which is handy for low-pwoer devices and/or constrained bandwidth.

However, also as with OSC, you can use TCP for CoAP if need be.

+1 for CoAP - We use it!