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Is there a good way to trigger a counter when power usage exceeds a certain value?

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Hi everyone!

I am wondering if there is a good way to trigger a counter when a smart plug reports a power usage higher than a certain value? I am using Aqara smart plugs, on zigbee.

What I hope to accomplish is to measure two sets of time from when my wood boiler is operating.

When it starts it’s mini-inferno, it activates a fan. When it has stopped burning and the fuel is reduced to ashes, it stops the fan.

What I would like to know is:

How long did it take to burn out the fuel? (ie how long was the fan operating).

How long has it been since the boiler last operated? (ie how long has it been since the fan stopped).

It is also important that the results are saved and can be looked at in the future, as I am trying to energy optimize my house. The longer time before having to start the boiler again, the more efficient heat retention.

A graphical counter on the UI would be really nice.

Anyone who can think of a solution? :slightly_smiling_face:

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