- er-example-server.c: A RESTful server example showing how to use the REST layer to develop server-side applications (at the moment only CoAP is implemented for the REST Engine).
- er-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).
- er-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 minimal-net).
- Make sure rpl-border-router has the same stack and fits into mote memory: You can disable RDC in border-router project-conf.h (not really required as BR keeps radio turned on). #undef NETSTACK_CONF_RDC #define NETSTACK_CONF_RDC nullrdc_driver
- Alternatively, you can use the native-border-router together with the slip-radio.
- For convenience, define the Cooja addresses in /etc/hosts aaaa::0212:7401:0001:0101 cooja1 aaaa::0212:7402:0002:0202 cooja2 ...
- Get the Copper (Cu) CoAP user-agent from https://addons.mozilla.org/en-US/firefox/addon/copper-270430
- Optional: Save your target as default target make TARGET=sky savetarget
###Server only:
make TARGET=cooja server-only.csc
Open new terminal
make connect-router-cooja
- Start Copper and discover resources at coap://cooja2:5683/
- Choose "Click button on Sky 2" from the context menu of mote 2 (server) after requesting /test/separate
- Do the same when observing /test/event
###With client:
make TARGET=cooja server-client.csc
Open new terminal
make connect-router-cooja
- Wait until red LED toggles on mote 2 (server)
- Choose "Click button on Sky 3" from the context menu of mote 3 (client) and watch serial output
###Server:
-
Connect two Tmote Skys (check with $ make TARGET=sky sky-motelist)
make TARGET=sky er-example-server.upload MOTE=2 make TARGET=sky login MOTE=2
-
Press reset button, get address, abort with Ctrl+C: Line: "Tentative link-local IPv6 address fe80:0000:0000:0000::::"
cd ../ipv6/rpl-border-router/ make TARGET=sky border-router.upload MOTE=1 make connect-router
For a BR tty other than USB0:
make connect-router-port PORT=X
-
Start Copper and discover resources at:
coap://[aaaa::____:____:____:____]:5683/
-
Change the hard-coded server address in er-example-client.c to aaaa:::::
-
Connect a third Tmote Sky
make TARGET=sky er-example-client.upload MOTE=3
With the target minimal-net you can test your CoAP applications without constraints, i.e., with large buffers, debug output, memory protection, etc. The er-plugtest-server is thought for the minimal-net platform, as it requires an 1280-byte IP buffer and 1024-byte blocks.
make TARGET=minimal-net er-plugtest-server
sudo ./er-plugtest-server.minimal-net
Open new terminal
make connect-minimal
- 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
Erbium implements the Proposed Standard of CoAP. Central features are commented in er-example-server.c. In general, apps/er-coap supports:
- All draft-18 header options
- CON Retransmissions (note COAP_MAX_OPEN_TRANSACTIONS)
- Blockwise Transfers (note REST_MAX_CHUNK_SIZE, see er-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 PRERIODIC_RESOURCE, note COAP_MAX_OBSERVERS)
- Dedicated Observe buffers
- Optimize message struct variable access (directly access struct without copying)
- Observe client
- Multiple If-Match ETags
- (Message deduplication)