Prerequisites

RESTClient

RESTClient is a firefox extensions which allows to send http REST requests with custom headers.

• Install RESTClient extension

Californium

In order to simulate CoAP connected devices, you must download Californium.

• Open Eclipse
• Select Window -> Show View -> Other.
• In the dialog box, select the Git view.
• Click on “Clone a Git repository”.
• In the URI form type: https://github.com/eclipse/californium.git
• In the second page, keep ONLY the “master” branch checkbox selected and click Next.
• Click “Finish”.
• This will clone the oM2M repository inside: $HOME/git/californium/.
• Select File -> Import
• In the dialog box, select Maven -> Existing Maven Project.
• In the Root Directory type: $HOME/git/californium/.
• Click “Finish”.

Create your new Application Dedicated Node (ADN)

• Open Eclipse
• Select File -> New -> Project.
• In the dialog box, select Maven -> Maven Project.
• Click on “Next”.
• Check the “Create a simple project” and click Next.
• In the second page, choose a Group id and an artifact id (e.g. it.unipi.iot.om2m and lamp, respectively).
• Click “Finish”.

Add Californium dependencies

• Open the pom.xml file of your project.
• Switch to the last tab called pom.xml
• Add the following dependencies and Maven repository to your pom.xml (without the dots) inside the project tag:

<dependencies>
...
    <dependency>
            <groupId>org.eclipse.californium</groupId>
            <artifactId>californium-core</artifactId>
            <version>1.1.0-SNAPSHOT</version>
    </dependency>
...
</dependencies>
...
<repositories>
...
    <repository>
      <id>repo.eclipse.org</id>
      <name>Californium Repository</name>
      <url>https://repo.eclipse.org/content/repositories/californium/</url>
    </repository>
    ...
</repositories>

Create the Main Class

• Right click on your project folder in the Project Structure Tab (on the left)
• Select New -> Class
• In the dialog box type the name of your class and set the package according to the Group id selected for the project (it is not required but it is a good practice).
• Check the “public static void main(String[] args)” in the stub creation section and click Finish.
• Finally to make your jar executable modify the pom.xml adding the following before the </project> closing tag:

<build>

  <plugins>
    <!-- download source code in Eclipse, best practice -->
    <plugin>
      <groupId>org.apache.maven.plugins</groupId>
      <artifactId>maven-eclipse-plugin</artifactId>
      <version>2.9</version>
      <configuration>
        <downloadSources>true</downloadSources>
        <downloadJavadocs>false</downloadJavadocs>
      </configuration>
    </plugin>

    <!-- Set a compiler level -->
    <plugin>
      <groupId>org.apache.maven.plugins</groupId>
      <artifactId>maven-compiler-plugin</artifactId>
      <version>2.3.2</version>  
    </plugin>

    <!-- Maven Assembly Plugin -->
    <plugin>
      <groupId>org.apache.maven.plugins</groupId>
      <artifactId>maven-assembly-plugin</artifactId>
      <version>2.4.1</version>
      <configuration>
        <!-- get all project dependencies -->
        <descriptorRefs>
          <descriptorRef>jar-with-dependencies</descriptorRef>
        </descriptorRefs>
        <!-- MainClass in mainfest make a executable jar -->
        <archive>
          <manifest>
            <mainClass>$PACKAGE.$MAINCLASS</mainClass>
          </manifest>
        </archive>
      </configuration>
      <executions>
        <execution>
          <id>make-assembly</id>
          <!-- bind to the packaging phase -->
          <phase>package</phase>
          <goals>
            <goal>single</goal>
          </goals>
        </execution>
      </executions>
    </plugin>
  </plugins>
</build>

where in my example $PACKAGE = it.unipi.iot.om2m while $MAINCLASS = Lamp.

Run your application

• Go inside your project root folder, e.g. $HOME/workspace/lamp.
• Type mvn package. It will generate the jar file inside the target folder.
• Execute your application by issuing:

$ java -jar target/$ARTIFACTID-0.0.1-SNAPSHOT-jar-with-dependencies.jar 

where in my example $ARTIFACTID = lamp.