Internet Engineering Task Force (IETF) Z. Shelby Request for Comments: 7252 ARM Category: Standards Track K. Hartke ISSN: 2070-1721 C. Bormann Universitaet Bremen TZI June 2014 The Constrained Application Protocol (CoAP) Abstract The Constrained Application Protocol (CoAP) is a specialized web transfer protocol for use with constrained nodes and constrained (e.g., low-power, lossy) networks. The nodes often have 8-bit microcontrollers with small amounts of ROM and RAM, while constrained networks such as IPv6 over Low-Power Wireless Personal Area Networks (6LoWPANs) often have high packet error rates and a typical throughput of 10s of kbit/s. The protocol is designed for machine-
