Difference between revisions of "Constrained Application Protocol"

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The '''Constrained Application Protocol''' ('''CoAP''') is a specialized web transfer protocol for use with constrained nodes and constrained networks in the Internet of Things.  
The '''Constrained Application Protocol''' ('''CoAP''') is a specialized web transfer protocol, as defined in RFC 7252, for use with constrained nodes and constrained networks in the Internet of Things.
The protocol is designed for machine-to-machine (M2M) applications such as smart energy and building automation.
The protocol is designed for machine-to-machine (M2M) applications such as smart energy and building automation.


== Features ==


The work on Constrained Environments aims at realizing the REST architecture in a suitable form for the most constrained nodes and networks. The nodes usually consist of 8-bit microcontrollers with limited amounts of RAM and ROM.


Das '''Constrained Application Protocol''' ('''CoAP''') ist ein spezielles Übertragungsprotokoll zur Verwendung auf Constrained-Nodes und Constrained-Devices im Internet der Dinge (engl. Internet of Things, IoT) . Das Protokoll ist für Maschine-to-Maschine- (M2M) Anwendungen wie intelligente Energie- und Gebäudeautomation ausgelegt und im RFC 7252 dolumentiert. Wie auch HTTP, basiert CoAP auf Representational State Transfer (REST), dem Architekturmodell für Webservices, bei dem Ressourcen von Servern durch einen Anwendungsprozess kontrolliert und über die Uniform Resource Identifiers (URI) identifiziert werden.
 
CoAP has the following main features:
 
* Web protocol fulfilling M2M requirements in constrained environments
* UDP [RFC0768] binding with optional reliability supporting unicast and multicast requests
* Asynchronous message exchanges
* Low header overhead and parsing complexity
* URI and Content-type support
* Simple proxy and caching capabilities
* Stateless HTTP mapping
* Security binding to Datagram Transport Layer Security (DTLS)
 
== Message Formats ==




Revision as of 13:00, 11 March 2019

The Constrained Application Protocol (CoAP) is a specialized web transfer protocol, as defined in RFC 7252, for use with constrained nodes and constrained networks in the Internet of Things. The protocol is designed for machine-to-machine (M2M) applications such as smart energy and building automation.

Features

The work on Constrained Environments aims at realizing the REST architecture in a suitable form for the most constrained nodes and networks. The nodes usually consist of 8-bit microcontrollers with limited amounts of RAM and ROM.


CoAP has the following main features:

  • Web protocol fulfilling M2M requirements in constrained environments
  • UDP [RFC0768] binding with optional reliability supporting unicast and multicast requests
  • Asynchronous message exchanges
  • Low header overhead and parsing complexity
  • URI and Content-type support
  • Simple proxy and caching capabilities
  • Stateless HTTP mapping
  • Security binding to Datagram Transport Layer Security (DTLS)

Message Formats

Courses

References

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