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George Oikonomou 155e2c9b0a Support both old and new button API in common examples 
This change is temporary so travis can pass until all platforms have been migrated to the new API
 		2018-03-14 09:34:47 +00:00
..
resources Migrate to LED HAL (CoAP example) 2018-03-01 15:29:30 +00:00
resources-plugtest renamed coap packet to coap message - for naming closer to RFC 2018-01-12 01:20:53 +01:00
sky The CoAP example no longer fits in the limited ROM in Tmote Sky. 2018-01-12 18:04:40 +01:00
Makefile Update Makefiles to be compatible with the new build system and restrict them to specific platforms where needed 2018-03-09 16:29:06 +00:00
README.md The CoAP example no longer fits in the limited ROM in Tmote Sky. 2018-01-12 18:04:40 +01:00
coap-example-client.c Support both old and new button API in common examples 2018-03-14 09:34:47 +00:00
coap-example-observe-client.c Support both old and new button API in common examples 2018-03-14 09:34:47 +00:00
coap-example-server.c Support both old and new button API in common examples 2018-03-14 09:34:47 +00:00
plugtest-server.c COAP: adapted CoAP examples to new API 2018-01-12 01:18:41 +01:00
plugtest.h CoAP: Various minor updates in CoAP example 2018-01-12 01:20:52 +01:00
project-conf.h The CoAP example no longer fits in the limited ROM in Tmote Sky. 2018-01-12 18:04:40 +01:00

README.md

A Quick Introduction to the Erbium (Er) CoAP Engine

EXAMPLE FILES

  • coap-example-server.c: A CoAP server example showing how to use the CoAP layer to develop server-side applications.
  • coap-example-client.c: A CoAP client that polls the /actuators/toggle resource every 10 seconds and cycles through 4 resources on button press (target address is hard-coded).
  • plugtest-server.c: The server used for draft compliance testing at ETSI IoT CoAP Plugtests. Erbium (Er) participated in Paris, France, March 2012 and Sophia-Antipolis, France, November 2012 (configured for native).

PRELIMINARIES

TMOTE SKY HOWTO

The CoAP example no longer fits in the limited ROM of the Tmote Sky. Please use a platform with larger ROM instead.

NATIVE HOWTO

With the target native you can test your CoAP applications without constraints, i.e., with large buffers, debug output, memory protection, etc. The plugtest-server is thought for the native platform, as it requires an 1280-byte IP buffer and 1024-byte blocks.

    make TARGET=native plugtest-server
    sudo ./plugtest-server.native

Open new terminal

    make connect-native
  • Start Copper and discover resources at coap://[fdfd::ff:fe00:10]:5683/
  • You can enable the ETSI Plugtest menu in Copper's preferences

Under Windows/Cygwin, WPCAP might need a patch in \usr\include\w32api\in6addr.h:

21,23c21
< #ifdef __INSIDE_CYGWIN__
<     uint32_t __s6_addr32[4];
< #endif
---
>     u_int __s6_addr32[4];
36d33
< #ifdef __INSIDE_CYGWIN__
39d35
< #endif

DETAILS

Erbium implements the Proposed Standard of CoAP. Central features are commented in coap-example-server.c. In general, coap supports:

  • All draft-18 header options
  • CON Retransmissions (note COAP_MAX_OPEN_TRANSACTIONS)
  • Blockwise Transfers (note COAP_MAX_CHUNK_SIZE, see plugtest-server.c for Block1 uploads)
  • Separate Responses (no rest_set_pre_handler() required anymore, note coap_separate_accept(), _reject(), and _resume())
  • Resource Discovery
  • Observing Resources (see EVENT_ and PERIODIC_RESOURCE, note COAP_MAX_OBSERVERS)

TODOs

  • Dedicated Observe buffers
  • Optimize message struct variable access (directly access struct without copying)
  • Observe client
  • Multiple If-Match ETags
  • (Message deduplication)