This is the documentation for the latest (main) development branch of Zephyr. If you are looking for the documentation of previous releases, use the drop-down menu on the left and select the desired version.

CoAP Server


This sample is a simple CoAP server showing how to expose a simple resource.

This demo assumes that the platform of choice has networking support, some adjustments to the configuration may be needed.

The sample will listen for requests in the CoAP UDP port (5683) in the site-local IPv6 multicast address reserved for CoAP nodes.

The sample exports the following resources:


These resources allow a good part of the ETSI test cases to be run against coap-server.

Building And Running

This project has no output in case of success, the correct functionality can be verified by using some external tool such as tcpdump or wireshark.

See the net-tools project for more details

This sample can be built and executed on QEMU or native_posix board as described in Networking with the host system.

Use this command on the host to run the libcoap implementation of the ETSI test cases:

sudo ./examples/ -i tap0 2001:db8::1

To build the version supporting the TI CC2520 radio, use the supplied prj_cc2520.conf configuration file enabling IEEE 802.15.4.