With the last update we got power graphs in the energy dashboard. That’s great.
To get the reading right, I have to choose a sensor that creates positive numbers when energy flows OUT of the battery. My battery counts exactly opposite.
So the natural(?) solution is to create a sensor that simply negates the value of the current sensor. This certainly works great.
But … I create just another sensor that stores yet another series of values in the statistic database. And I only get values, starting with the time of the creation of the new sensor.
What I REALLY want is a sensor that just calculates “value = -other_sensor” wherever a value is needed. Need a history? Request “value = -other_sensor” from the current history of an existing sensor.
Or a possibility to name “a formula” wherever “a sensor” is asked.
Similar to a unit-conversion.
Does that sound unrealistic?