I have 3 illumination sensors pointed in different celestial directions.
Ive noticed on cloudy days they’ll return a very similar value and on sunny days the sensor pointing in direction of the sun will clearly peak above the other two sensors.
I was hoping to uses this to create a “is it sunny or cloudy” sensor by simply looking at the std. deviation of the three values.
I thought to do this with the statistics platform but its entity_id only supports a single entity and compares its values over time. What i need is comparing different sensors at a single point in time.