Tutorial: Listening to a Topic Data Value
- Examine a topic you want to monitor. In this example, we will be monitoring the conveyor as it switched from moving to not moving. The topic it publishes data too is /state. The value it toggles is "data"
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- Now that we are aware of the topic we want to monitor, we can navigate to the Device Statistics. This is found in the Device Settings.
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3 On the page, click Add Statistic.
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- A side drawer will appear on the right side. It will ask for the following properties to be filled out:
Type | The statistic category. For this type, we will choose: Topic data value. |
Name | A unique name to describe the statistic. |
Description | A long form input that can describe the statistic in more detail. |
Force Denominator | This can be omitted. It is used when calculating the graph representation of the data. |
Compute When | Expected Available or when Active. This will control when the statistic is recorded as a value. |
Topic | The topic of choice to evaluate. In our example, we are looking at the /state topic. |
Data Index | The data property of the topic. In this example we are looking at the data property. This would be denoted by ["data"]. |
Aggregation | How often do you want the statistic to be calculated? In this example we are choosing every minute. |
For example, with the form filled out:
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You will see the statistic show up in the list of statistics.
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- Next navigate to the fleets. On the left side nav, click Fleets.
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- Choose the fleet of choice you want to see the statistic in.
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- For this example, we are choosing the Freedom Factory. Click the statistics icon. It is the heartbeat icon.
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- You will be navigated to the statistics section of the fleet. On the top right of this page, click Manage Statistics.
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- A side drawer will appear. At the bottom of this drawer, click Add Statistic.
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- Fill out the form with the statistic that has been created. Click Save.
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Statistic Calculations
Statistics will start generating upon the time they are created. You will not see historical data being used to generate statistics. In this case, I have let some time pass to show over the last week the conveyor movement.
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Updated almost 3 years ago