Event based on value over time?

[htilly]

How can I trigger an alarm if a value has been over a threshold over a period of time?

I.e. if power consumption is above "X" for "Y" minutes, then send alarm.
Or if temperature is below "X" degrees for "Y" minutes.

Is this possible?

Thanks in advance.

BR
Tilly

[pj-r]

You can archieve this with quite simple lua script.
in script check if value is good -> store time to user variable
check if time from last good value is too long ago -> send alarm and set user variable