Display Brightness for Wear
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+ By Daniel Velazco
This is only necessary for watches that don't have an ambient light sensor.
Sunrise and sunset times are calculated based on your location.
If it's night time, the brightness will always be set to the lowest.
If it's day time, it will determine the brightness, between medium and high, based on the current user activity. For example, if the user is driving the brightness will always be set to the highest. If the user is still, then the brightness will be set to medium.
By using the activity detection, we are making assumptions to determine whether the user is indoors, or outdoors, and then setting the display brightness on the watch based on that.
For battery saving purposes, there may be a delay between each detection.