CoAP -17
TinyOS CoAP (-17)
Contents
This page describes how to setup the TinyOS CoAP (-17) implementation based on libcoap and uses the TinyOS blip-rpl stack for UDP communication.
You can find the previous version of this page at: CoAP and CoAP_-13.
Installation instructions
Compile libcoap and examples
cd $TOSROOT/support/sdk/c/coap autoconf ./configure make ./configure --with-tinyos
The code has been tested on TelosB nodes only, yet. The sample implementation depends on TelosB sensors.
Compile and install CoapBlip application
To install CoapBlip on a mote, attach the mote via USB and run the following set of commands:
cd $TOSROOT/apps/CoapBlip make telosb blip coap install,3 bsl,/dev/ttyUSB0
Setting up PppRouter and ppp connection
To install the PppRouter application for IPv6 support on the second attached mote, execute
cd $TOSROOT/apps/PppRouter
and install the PppRouter:
make telosb blip install bsl,/dev/ttyUSB1
Next, start the ppp connection by executing
sudo pppd debug passive noauth nodetach 115200 /dev/ttyUSB1 nocrtscts nocdtrcts lcp-echo-interval 0 noccp noip ipv6 ::23,::24
After entering the sudo password, a similar output should be printed on your screen:
using channel 1 Using interface ppp0 Connect: ppp0 <--> /dev/ttyUSB1 sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xc33c412b> <pcomp> <accomp>] rcvd [LCP ConfRej id=0x1 <magic 0xc33c412b> <pcomp>] sent [LCP ConfReq id=0x2 <asyncmap 0x0> <accomp>] rcvd [LCP ConfAck id=0x2 <asyncmap 0x0> <accomp>] rcvd [LCP ConfReq id=0x3 <mru 1280> <asyncmap 0x0> <accomp>] sent [LCP ConfAck id=0x3 <mru 1280> <asyncmap 0x0> <accomp>] sent [IPV6CP ConfReq id=0x1 <addr fe80::0000:0000:0000:0023>] rcvd [IPV6CP ConfReq id=0x1 <addr fe80::0000:0000:0000:0000>] sent [IPV6CP ConfNak id=0x1 <addr fe80::0000:0000:0000:0024>] rcvd [IPV6CP ConfReq id=0x2 <addr fe80::0000:0000:0000:0000>] sent [IPV6CP ConfNak id=0x2 <addr fe80::757d:cee8:dcad:b877>] rcvd [IPV6CP ConfReq id=0x3 <addr fe80::0000:0000:0000:0024>] sent [IPV6CP ConfAck id=0x3 <addr fe80::0000:0000:0000:0024>] sent [IPV6CP ConfReq id=0x1 <addr fe80::0000:0000:0000:0023>] rcvd [IPV6CP ConfAck id=0x1 <addr fe80::0000:0000:0000:0023>] local LL address fe80::0000:0000:0000:0023 remote LL address fe80::0000:0000:0000:0024 Script /etc/ppp/ipv6-up started (pid 23284) Script /etc/ppp/ipv6-up finished (pid 23284), status = 0x0
Open a new terminal and run
sudo ifconfig ppp0 add fec0::100/64
The ppp connection is now established.
Run CoAP example client
To run the CoAP example client and request a resource from the server execute the following commands:
cd $TOSROOT/support/sdk/c/coap/examples ./coap-client coap://[fec0::3]/<URI>
whereas <URI> specifies the resource you want to access.
For TelosB motes, currently the following resources are supported and can be enabled/disabled in the Makefile of the CoAP application:
| Flag | URI | GET | PUT | POST | DELETE | Comments |
|---|---|---|---|---|---|---|
| #WITHOUT_WELLKNOWN | .well-known/core | X | - | - | - | Core Link Format of URIs |
| COAP_RESOURCE_DEFAULT | X | X | X | X | Resource for POST and DELETE support | |
| COAP_RESOURCE_TEMP | /st | X | - | - | - | Temperature |
| COAP_RESOURCE_HUM | /sh | X | - | - | - | Humidity |
| COAP_RESOURCE_VOLT | /sv | X | - | - | - | Voltage |
| COAP_RESOURCE_ALL | /r | X | - | - | - | Temperature + Humidity + Voltage |
| COAP_RESOURCE_KEY | /l | X | X | - | - | LEDs |
| COAP_RESOURCE_ROUTE | /rt | X | - | - | - | Routing table |
| COAP_RESOURCE_ETSI_IOT_VALIDATE | /validate | X | X | - | - | Resource which varies |
| COAP_RESOURCE_ETSI_IOT_SEGMENT | /seg1/seg2/seg3 | X | - | - | - | Long path resource |
| COAP_RESOURCE_ETSI_IOT_SEPARATE | /separate | X | X | - | - | Resource with separate response |
| COAP_RESOURCE_ETSI_IOT_LOCATION_QUERY | /location-query | X | - | X | - | Resource accepting location query parameters |
| COAP_RESOURCE_ETSI_IOT_QUERY | /query | X | - | - | - | Resource accepting query parameters |
| COAP_RESOURCE_ETSI_IOT_LARGE | /large | X | - | - | - | Large resource |
| COAP_RESOURCE_ETSI_IOT_OBSERVE | /obs | X | X | - | - | Observable resource which changes every 5 seconds |
| COAP_RESOURCE_ETSI_IOT_MULTI_FORMAT | /multi-format | X | - | - | - | Resource that exist in different content-formats |
Note: Due to restricted memory capacities on TelosB motes, you may not be able to enable all resources at the same time!
All ETSI_IOT resources were tested during the 2nd CoAP Plugtest. Further information can be found in the test description
As an example for accessing the LED resource, the following commands can be used:
GET request:
./coap-client coap://[fec0::3]/l
PUT request:
./coap-client -m put coap://[fec0::3]/l -e 7
This should turn on all three Leds on the node.
