Virtual light sensor

[Mariusthvdb (Marius)]

@swiftlyfalling

sunlight_pct: entity_id: - sun.sun - sensor.dark_sky_cloud_coverage value_template: >- {%- set elevation = state_attr(‘sun.sun’,‘elevation’) | float %} {%- set cloud_coverage = states(‘sensor.dark_sky_cloud_coverage’) | float %} {%- set cloud_factor = (1 - (0.75 * ( cloud_coverage / 100) ** 3 )) %} {%- set min_elevation = -6 %} {%- set max_elevation = 90 %} {%- set adjusted_elevation = elevation - min_elevation %} {%- set adjusted_elevation = [adjusted_elevation,0] | max %} {%- set adjusted_elevation = [adjusted_elevation,max_elevation - min_elevation] | min %} {%- set adjusted_elevation = adjusted_elevation / (max_elevation - min_elevation) %} {%- set adjusted_elevation = adjusted_elevation %} {%- set adjusted_elevation = adjusted_elevation * 100 %} {%- set brightness = adjusted_elevation * cloud_factor %} {{ brightness | round }} unit_of_measurement: ‘%’ device_class: ‘illuminance’

very nice indeed, testing as we speak. with the Open weather map cloud percentage. Will see tonight when the lights go off (hardware light sensor) what setting that is. Used to check against sun elevation, but this might be more adequate.

btw you can leave out the entity_id’s, since they are in the template itself. No complaints are thrown.