added readme for ipso-objects

examples/ipso-objects/README.md

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+IPSO Objects Example
+============================================
+
+This is an example of how to make use of the IPSO Object and LWM2M
+implementation in Contiki.
+
+The LWM2M implementation is based on the Erbium CoAP implementation
+and consists of two apps: lwm2m-engine and ipso-objects. The
+lwm2m-engine handle the specifics of LWM2M including bootstrapping and
+how read/writes of objects and resources are handled. The ipso-objects
+contains implementations of some of the IPSO Smart Objects.
+
+The implementation was used during the IPSO Interop in May 2015,
+Kista, Sweden, and was successfully tested with other
+implementations.
+
+The examples use some of the basic IPSO object for controlling LEDs on
+Contiki devices and for reading out temperature.
+
+##Testing IPSO-objects with Leshan
+
+First program a device with the examples/ipso-objects/example-ipso-objects.c
+
+```bash
+>make example-ipso-objects.upload TARGET=zoul
+>...
+```
+
+After that start up a native-border router or other border router on aaaa::1/64
+or another prefix - NOTE: if you use another prefix you will need to change LWM2M_SERVER_ADDRESS for which the device will register - in project-conf.h:
+```
+#define LWM2M_SERVER_ADDRESS "aaaa::1"
+```
+
+Then when everything is setup you can download a Leshan and use that to
+test controlling LEDs of the device.
+
+###Starting Leshan
+```bash
+wget https://hudson.eclipse.org/leshan/job/leshan/lastSuccessfulBuild/artifact/leshan-standalone.jar
+java -jar ./leshan-standalone.jar
+```
+Browse to leshans device page with http://127.0.0.1:8080 .
+
+When you have started the border-router and also Leshan you should now
+start (or reboot) your IPSO Object enabled device. Within 30 seconds
+you should be able to see it on the Leshan device page.
+