Domoticz

Hi

Is it possible to make a script that trigger an event when temperature starts to drop and not when getting below an value?

I'm using a woodburning stove for heating, but I often forget to fill new batch of wood before it gets to cold, and I have to fire up again.
So I have placed a temp-sensor nearby the stove, and trying to set up Domoticz to notify when it's time to fill more wood.
After filling with new wood, I see temperature rises, but how high depends on how mutch and type of wood.
So I cant use an exact threshold walue, Instead I want to be notified each time temp starts to drop. But I cant find any value representing rising or falling temp like the red up-arrow or blue down-arrow left of tempvalue in GUI? Is there a way to detect rising or falling temp?

br
Roald Nakstad

Sure. What you can do is use the dzvents data section to define some variable (or more) that calculates the average every time it is called. Use a timer to start the script. If the current temperature deviates by a determined margin from the average then alert. If not then calculate a new average.
I use this to monitor when my washer is done and measure power consumption. If that drops below a threshold for a couple of times, i know it's done. Same principle.

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With Blockly I set a variable to equal the current temperature, then after a set period (triggered by a virtual switch that is time to turn on after a set period) i have the script run again and also compare the current temp with the previously set variable and act on this information, either to set the alarm or restart the loop.