simulated-devices/billboard/src/main/resources/billboard-resource.xml

<!--
  ~ Copyright (c) 2020 Kentyou.
  ~ All rights reserved. This program and the accompanying materials
  ~ are made available under the terms of the Eclipse Public License v1.0
  ~ which accompanies this distribution, and is available at
  ~ http://www.eclipse.org/legal/epl-v10.html
  ~
  ~ Contributors:
*    Kentyou - initial API and implementation
  -->

<resourceInfos xmlns="http://org.eclipse.sensinact/resource" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://org.eclipse.sensinact/resource ../../../../../platform/sensinact-generic/src/main/resources/sensinact-resource.xsd">
    <resourceInfo xsi:type="resourceInfoAction" name="DISPLAY"  target="screen">
        <identifier xsi:type="stringContent">DISPLAY</identifier>
       <methods>
        <method type="ACT">
            <parameter name="message" type="string"/>
            <references>
                <reference reference="MESSAGE" passOn="true" xsi:type="copyReference">
                    <builder type="PARAMETER">
                        <argument type="int">
                            <value>0</value>
                        </argument>
                    </builder>
                </reference>
            </references>
        </method>
      </methods>
    </resourceInfo>
    <resourceInfo xsi:type="resourceInfoVariable" name="MESSAGE"  target="screen">
        <identifier xsi:type="stringContent">MESSAGE</identifier>   
	    <attributes>
	    	<attribute name="value" type="string">
	    		<value>Hello sensiNact</value>
	    	</attribute>
	    </attributes>
    </resourceInfo>
    <devices>
        <device identifier="billboard">
            <service name="screen"/>
        </device>
    </devices>
</resourceInfos>