ASCII Encoding for Constrained Application Protocol (CoAP/A)

Document Type Expired Internet-Draft (individual)
Authors Seok-Kap Ko  , Ilkyun Park  , Seung-Hun Oh  , Byoung-Tak Lee 
Last updated 2014-01-16 (latest revision 2013-07-15)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document defines ASCII encoding method for Constrained Application Protocol(CoAP). CoAP has defined a binary encoding method to exchange requests and responses between constrained nodes or gateways. However, some communication modules in constrained nodes support ASCII data only. These modules are cheaper and widely deployed. To support these modules, this document describes the method to convert binary CoAP messages to base64 styled ASCII messages.


Seok-Kap Ko (
Ilkyun Park (
Seung-Hun Oh (
Byoung-Tak Lee (

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