CoAP

The Constrained Application Protocol (CoAP) is a specialized web transfer protocol for use with constrained networks and nodes for machine-to-machine applications such as smart energy and building automation.
These constrained nodes often have 8-bit microcontrollers with small amounts of ROM and RAM. CoAP provides a method/response interaction model between application end-points, supports built-in resource discovery, and includes key web concepts such as URIs and content-types. CoAP easily translates to HTTP for integration with the web while meeting specialized requirements such as very low overhead and simplicity for constrained environments.

draft-ietf-core-coap-07

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