To configure the sensors polling in OpenNMS it is necessary to make the following changes in the configuration files:

1. Add to directory opennms / etc / data collection file didactum.xml as follows:

Name: didactum.xml

<?xml version="1.0"?>

<datacollection-group name="didactum">

 <!-- didactum Resource Types -->

 <resourceType name="hrElementIndex" label="Element ID">

   <persistenceSelectorStrategy class="org.opennms.netmgt.collectd.PersistAllSelectorStrategy"/>

   <storageStrategy class="org.opennms.netmgt.dao.support.IndexStorageStrategy"/>

 </resourceType>

 <!-- didactum mibs -->

 <group name="didactumElements" ifType="all">

   <mibObj oid=".1.3.6.1.4.1.39052.1.3.1.7" instance="hrElementIndex" alias="hrElementName" type="string"  />

   <mibObj oid=".1.3.6.1.4.1.39052.1.3.1.9" instance="hrElementIndex" alias="hrElementValue" type="octetstring" />

 </group>

 <systemDef name="didactum EMS">

   <sysoidMask>.1.3.6.1.4.1.8072.3.2.</sysoidMask>

     <collect>

       <includeGroup>vutlanElements</includeGroup> 

     </collect>

 </systemDef>

</datacollection-group>

2. Enable file processing didactum.xml in opennms / etc / data collection-config.xml file

Name: datacollection-config.xml

<?xml version="1.0"?>

<datacollection-config rrdRepository="/opt/opennms/share/rrd/snmp/">

 <snmp-collection name="default" snmpStorageFlag="select">

   <rrd step="300">

     <rra>RRA:AVERAGE:0.5:1:2016</rra>

     <rra>RRA:AVERAGE:0.5:12:1488</rra>

     <rra>RRA:AVERAGE:0.5:288:366</rra>

     <rra>RRA:MAX:0.5:288:366</rra>

     <rra>RRA:MIN:0.5:288:366</rra>

   </rrd>

   ..

   <include-collection dataCollectionGroup="Didactum"/>

 </snmp-collection>

</datacollection-config>

3. Create a report in opennms/etc/snmp-graph.properties:

Name: snmp-graph.properties

# do not forget to include in the list of reports
reports=mib2.HCbits, mib2.bits, mib2.percentdiscards, mib2.percenterrors, \
..
mysql.key.reads, mysql.key.writes, \
vutlan.elements

# report in the form of graphs

report.didactum.elements.name=Data

report.didactum.elements.columns=hrElementValue

report.didactum.elements.type=hrElementIndex

report.didactum.elements.propertiesValues=hrElementName

report.didactum.elements.command=--title="Value of '{hrElementName}'" \

DEF:elemValue={rrd1}:hrElementValue:AVERAGE \

LINE2:elemValue#0000ff:"Value   " \

GPRINT:elemValue:AVERAGE:"          Value  \\: %8.2lf %s\\n" \ 

4. Restart OpenNMS with command

# opennms restart

5. The properties of the nodes in the web interface: Home / Reports / Resource Graphs / Choose select elements by ID and press Graph Selection. 

Documentation: http://www.opennms.org/wiki/Collecting_SNMP_data_from_tables_with_arbitrary_indexes