jrabin Posted November 13, 2016 Posted November 13, 2016 I use sunrise and sunset for timing triggers, but I would like to open some Insteon control shades at midday + 1 hour? I'm thinking midday should be '(sunset - sunrise)/2 + sunrise'. Any ideas? Jeff
larryllix Posted November 13, 2016 Posted November 13, 2016 (edited) I use sunrise and sunset for timing triggers, but I would like to open some Insteon control shades at midday + 1 hour? I'm thinking midday should be '(sunset - sunrise)/2 + sunrise'. Any ideas? Jeff You are looking for solar noon, which most PV fans are familiar with. Your formula is right on, but you will find it never varies, season to season. The longitudinal angle of the sun is always the same for the same time of day while the latitude angle changes. Calculate it once and use it for a time trigger. For DST you may need to use a seasonal condition or two programs based on calendar calcs. Easy in v5. Edited November 14, 2016 by larryllix
giesen Posted November 14, 2016 Posted November 14, 2016 You could also use isylink/nodelink which gives you the sun's position in the sky... Sent from my SM-N910W8 using Tapatalk
larryllix Posted November 14, 2016 Posted November 14, 2016 You could also use isylink/nodelink which gives you the sun's position in the sky... Sent from my SM-N910W8 using Tapatalk IIRC he would need V5 for nodelink also.
giesen Posted November 14, 2016 Posted November 14, 2016 Yes but can use isylink with v4 Sent from my SM-N910W8 using Tapatalk
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