I would like to record the operating time of a switch.

I would like :
- A graph giving me the duration of use (on / off state) as a switch log windows (24h or 48h graph)
- A cumulative graph giving the total operating time per day, week, month, much like the water meter.

For example to see if a ...

Thanks for the answer, I will make a try...
Do you know here i should ask for this implementation, in the "Suggestions" forum or in "Feature tracker" forum ?

Hello,

I want to record the operating time of my gas boiler (the time that my thermostat told the circulator: go ! :) )
I do not see what type of meter, I have to use,
I would like :
- A graph giving me the duration of use ( on / off) as a switch ( 24h or 48h graph)
- A cumulative graph giving me ...