Skip to main content

CoAP Implementation Guidance

Document Type Expired Internet-Draft (lwig WG)
Expired & archived
Authors Matthias Kovatsch , Olaf Bergmann , Carsten Bormann
Last updated 2019-01-03 (Latest revision 2018-07-02)
Replaces draft-kovatsch-lwig-coap
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Additional resources Mailing list discussion
Stream WG state WG Document
Document shepherd (None)
IESG IESG state Expired
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


The Constrained Application Protocol (CoAP) is designed for resource- constrained nodes and networks such as sensor nodes in a low-power lossy network (LLN). Yet to implement this Internet protocol on Class 1 devices (as per RFC 7228, ~ 10 KiB of RAM and ~ 100 KiB of ROM) also lightweight implementation techniques are necessary. This document provides lessons learned from implementing CoAP for tiny, battery-operated networked embedded systems. In particular, it provides guidance on correct implementation of the CoAP specification RFC 7252, memory optimizations, and customized protocol parameters.


Matthias Kovatsch
Olaf Bergmann
Carsten Bormann

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)