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How to Use SNMP Get Requests for Analogs

Morgana Siggins
Morgana Siggins
Monitoring Specialist

When an SNMP manager wants to check on the status of managed devices it sends an SNMP Get Request to retrieve individual Management Information Base (MIB) values. The managed devices will then send back information to answer the Get Request message.

If, in your remote sites, you have analog points you need to monitor, then being able to successfully know how to use your master station to capture your analogs through Get Requests is very important. This guarantees monitoring efficiency and you can have complete visibility over your analogs.

That's why if you have our T/Mon master station, we want to make sure you know how to set up your Get Requests. In this article, we'll go over the step-by-step on how you can use SNMP Get Requests to capture analogs in the T/Mon.

Find the Analog you Want to Capture

First of all, make sure you know which analogs you want to capture. You can to this by opening the MIBs from the manufacturer in a MIB browser. We recommend the iReasoning free MIB browser - you can download it here http://ireasoning.com/mibbrowser.shtml.

Now that you know the OID and name of the analog you want to capture, you can continue. As an example, we will be using the AVTECH Room Alert. The Room Alerts internal temperature in Fahrenheit can be captured using the OID ".1.3.6.1.4.1.20916.1.8.1.1.1.1.0", which is found in the MIB.

Add the Analog to the Blueprint

Edit Module Logger

The module logger is a script that will that will run at defined intervals. It's in here that you will define which OIDs will be used in the Get Requests.

T/Mon master station screen

Test the Analog

Troubleshooting Checklist

JSON is malformed

This is due to an error in syntax. You can look at your recent changes and make sure the following is true:

Error when saving Logger file

I keep getting device failures on my device

My analog values are not showing up

There can be various reasons why the analog values are not showing up.

After I added analogs to the blueprint, I couldn't edit my device

Most likely the device you cloned from didn't have the proper support for analogs. You can easily fix this with with a few lines and a refresh.

The Bottom Line

If you need assistance with the process of using SNMP Get Requests to capture analogs in T/Mon, or you need to troubleshoot any issues you might be experiencing, just contact our tech support.

We aim to provide excellent, personalized tech support to our clients. There's no voicemail, you don't have to navigate menus, instead, you get to talk to a real person. In fact, every support tech is an experienced engineer that will help you diagnose and fix any issues. So, if at any point you experience any kind of problem, simply give us a call.

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