I have a tank at home which is periodically filled. I have a sensor which tells me how much usage (liter) there was yesterday.
I would now like to track the remaining liter in the tank, by summing all my yesterdays levels since it was filled.
So:
- I know the level it has when it was filled (lets say 1000l got delivered) (X)
- I know the date it was filled (Y)
- I know the usage of every day (Z)
Can I now have a sensor which SUMS all the yesterdays Values (Z) since a specific date (Y)?
I tried using a historic sensor, but it seems that one is more limited to having a certain state, while the state I have in Z can be anywhere from 0 liter to 20 liter, with 2 decimals.