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Neat project! I've been trying to figure out a smart home automated system to determine if shades should be open or closed to optimize for energy efficiency, a

Neat project! I've been trying to figure out a smart home automated system to determine if shades should be open or closed to optimize for energy efficiency, accounting for sun intensity, time of day, and orientation of the window. I suppose I could throw something like this on rather than relying on generic sunrise and sunset times. Did you have a lot of wrangling with coordinate systems and the location of the sun changing throughout the year?

tppiotrowski 6y ago
Suncalc [1] is the library I use to calculate the position of the sun. Mapzen [2] host public elevation tile data. This blog post [3] is a good overview of the calculations involved. [1] https://github.com/mourner/suncalc https://github.com/mourner/suncalc [2] https://www.mapzen.com/blog/terrain-tile-service/ https://www.mapzen.com/blog/terrain-tile-service/ [3] http://www.liedman.net/2014/06/25/sunshine/ http://www.liedman.net/2014/06/25/sunshine/