CoAP RFCs
CoAP, Constrained Application Protocol, is a communications protocol intended for ‘constrained’ devices, such as those with less resources or power. It is similar to HTTP in scope.
The Original RFC
Further RFCs
- RFC 7641 — Observing Resources in the Constrained Application Protocol (September 2015)
- RFC 7959 — Block-Wise Transfers in the Constrained Application Protocol (August 2016)
- RFC 8232 — Optimizations of Label Switched Path State Synchronization Procedures for a Stateful PCE (September 2017)
- RFC 8323 — CoAP over TCP, TLS, and WebSockets (February 2018)
- RFC 8613 — Object Security for Constrained RESTful Environments (July 2019)
CoAP Parameter Numbers
IANA also maintains the lists of CoAP parameter numbers, including the method codes, response codes, option numbers, and Content-Format
numbers.