![]() ![]() You can tell if you made a mistake when the result you get is negative for sunrise. Therefore, to make sure you get accurate results for your location, you must set a local timezone for the LAT and LON you are using. All math is done without a timezone, (timezone = 0).To get accurate results for your location, you need both the Latitude and Longitude, AND a local timezone.Note that it does rely on positive or negative longitude, so you are at -100 longitude, but put 100 longitude in, you will get invalid results. You need an accurate position, both latitude and longitude, which the library needs to provide accurate timing.If your results seem off by some set number of hours, a bad or missing timezone is probably why. Note that you also need an accurate timezone as the calculation is to UTC, and then the timezone is applied before the value is returned. For best results, make sure your clock is accurate to within a second if possible. If you do not have a good clock source, then the results are going to be very accurate relative to your not so accurate clock. If you’re running this with something that can get GPS time or use NTP, then results will always be very accurate. To use SunSet, you need to a few bits of local information. Test results can be found for the latest release on the release page. I also run a small ino on a Particle Photon to prove that it works against a micro as well. This is done with the cmake config test above. I primarily use google test to validate the code running under Linux. See notes below for the ESP devices, ESP32 and ESP8266. I don't use PlatformIO for much but some compile time testing. Arudino IDE (must be for 32 bit micros).Onion cross compiled using KDevelop and Eclipse.I have used the following build systems with this library as well Particle Photon (latest ParticleOS release 1.5.2 works with Sunset 1.1.0).This does mean that the original Arudino and other similar 8 bit micros cannot use this library correctly. It really does require a 32 bit system at a minimum, and due to the math needs, a 32 bit processor that has native floating point support is best. I have used this library on the following systems successfully, and test it on a Raspberry PI. There is a hard requirement on 32 bit systems at a minimum due to needing full 32 bit integers for some of the work. This should work on any platform that supports C++ 14 and later. Starting with master and 1.1.1, you must use I have migrated to an all lower case file name structure. Can accurately calculate Astronomical Sunrise and Sunsetįind Doxygen documentation at Version 1.1.1 IMPORTANT changes.Can accurately calculate Civil Sunrise and Sunset.Can accurately calculate Nautical Sunrise and Sunset.Can accurately calculate Standard Sunrise and Sunset. ![]() Since version 1.1.0, it will also calculate other sunrise/sunset times depending on your needs. It will calculate the Moon position generically. Since then, I have updated it a bit to do some more work. I found Mike’s code, and modified it a bit to be a library that can be used again and again. I needed an algorithm that could tell me when it was dark out for all intents and purposes. This is a modification of the sunrise.c posted by Mike Chirico back in 2004. Calculate Sunrise and Sunset based on time and latitude and longitude ![]()
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