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Level 14

Alert on temperature rate of change

Has anyone cracked this nut yet?

I want to use a rate of change alert for temperature. So if a monitored temperature increases, say by 10° in 10 minutes, then it would kick on the alert. 

I know I can set a valued threshold but would like to also use a rate of change trigger.


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I've only seen it done with sql/swql. Roughly like this psuedo sql

Select nodeuri
From nodes
Join whatever table has the temp data
Where timestamp > dateadd(mm,-10,getutcdate())
Group by nodeid
Having (max(tempvalue) - min(tempvalue)) > 10
- Marc Netterfield, Github

does any one got the query ?

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