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Temperature Monitoring with the Sensatronics EM1 and HP Openview
This document describes how to set up the Sensatronics EM1 with HP Openview Version 7.5 in order to monitor the temperature in your server room.
HP Openview is acknowledged to be one of the most comprehensive Network Management suites available. As such it contains a great many features and options. This document does not attempt to describe everything of which HP Openview is capable.
Setting up the EM1-Overview
The following overview lists the steps you need to perform:
- Load the Sensatronics EM1 MIB
- Define the data collection
- Add a new MIB Object
- Define the Collection Mode
- Set Alarm Thresholds
- Graph the data
Checklist
Before you begin gather together the following information:
- SNMP Read Community Name for HPOV
- SNMP Write Community Name for HPOV
- SNMP Read Community Name for the EM1
- SNMP Write Community Name for the EM1
You will need the following files for the EM1:
- sensatronics-smi.my
- sensatronics-em1.my
Load the Sensatronics EM1 MIB
In HPOV click on Options
Select MIB Application Builder:SNMP
The Load/Unload MIBs: SNMP screen appears.
From the list select the files
sensatronics-smi.my
and
sensatronics-em1.my
Click Load…
Define the Data Collection
In HPOV click on Options
Select Data Collection and Thresholds:SNMP
Select Edit - MIB Object - New…
If the MIBs have loaded, select from the mib tree:
.iso.org.dod.internet.private.enterprises.sensatronics.consumerProducts.envMonitors.productEM1.sensorInfo.group1
Select the group1TempDataInt object.
Click OK.
Set Alarm Thresholds
You then need to define the collection mode and source address of the device, and also any thresholds you wish to send alarms for.
This example just does a store, so you can graph the data at a later date.
The following screen shows the polling details for the MIB object previously selected, from the source selected with ’Store’ and no ’Thresholds’ selected.
Save the configuration.
Graphing the Data
To get started set the poll interval (on the same screen as when you defined the source address) to about 10 seconds. Wait for a minute or two, then try to graph the data.
You can test your SNMP Community Names by highlighting the collector in the ’MIB object collection summary’ window and selecting ’Actions - Test SNMP’. If the Community Names are correct, you should get a window with a sample from your EM1.
Showing the source device, the mib object, and the sample data, in this case instance 0 with value of 73deg F.
If the data collects ok, you should then be able to do a ’Actions - Show Data’
Click the ’Graph’ button and the data is graphed.
All of this presumes that the EM1 device is in the topology in HPOV, and all the necessary SNMP community strings are set properly on the device and in HPOV.
Acknowledgements
Thanks to Mark Brook of NE Lincolnshire Council for his help with this article.
About the Author
Denis Laverty possesses more than 17 years experience in network management and communications, Denis has been involved with network management applications from the early DOS days; as product trainer, technical author and QA Director. In 2003 he co-founded OPENXTRA together with Jack Hughes and serves as its Managing Director.