Title: CoAP Server

Description:

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 exported resource, with path '/test', will just respond any GET to
that path with the the type, code and message identification retrieved
from the request. The response will have this format:

Type: <type>
Code: <code>
MID: <message id>

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Building and Running Project:

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

See the net-tools[1] project for more details

It can be built and executed on QEMU as follows:

    make qemu

[1] net-tools:
    https://gerrit.zephyrproject.org/r/gitweb?p=net-tools.git;a=tree

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Troubleshooting:

Problems caused by out-dated project information can be addressed by
issuing one of the following commands then rebuilding the project:

    make clean          # discard results of previous builds
                        # but keep existing configuration info
or
    make pristine       # discard results of previous builds
                        # and restore pre-defined configuration info

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