I am using Arduino IDE to program my ESP8266. I would like to send data from one ESP8266 module to other. So I would like to use CoAP for this communication. Is there any standard or good library to implement CoAP in ESP8266?

2 Answers 2


There are no standards only RFCs for CoAP; all of them are accessible on the web:

  1. RFC 7228 - Terminology for Constrained-Node Networks, May 2014
  2. RFC 7252 - The Constrained Application Protocol (CoAP), June 2014

I think you were looking for this. I use this library for my arduino projects on a Wemos esp8266 based board.


  • 2
    Hi Ebleme, please tell us a bit about why this would be a good library to use. SE is not a good format for "once sentence and a link answers".
    – Helmar
    Oct 29, 2018 at 20:05

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