62 lines
1.7 KiB
Arduino
62 lines
1.7 KiB
Arduino
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//======================================================================================================================
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// SolarCalculator Library for Arduino example sketch: SunriseSunsetAltitude.ino
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//
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// Calculate the rise and set times at a height above the level of the horizon.
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//
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// Tested with Arduino IDE 1.8.19 and Arduino Uno
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//======================================================================================================================
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#include <SolarCalculator.h>
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void setup()
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{
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Serial.begin(9600);
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// Date
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int year = 2022;
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int month = 1;
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int day = 1;
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// Location
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double latitude = 45.5034;
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double longitude = -73.5869;
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int utc_offset = -5;
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double transit, sunrise, sunset;
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// From the Explanatory Supplement to the Astronomical Almanac (1992), p. 484
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// Sunrise or sunset at a height above the level of the horizon occurs when the Sun's altitude is approximately:
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int height = 200; // in meters
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double sun_altitude = SUNRISESET_STD_ALTITUDE - 0.0353 * sqrt(height);
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// Calculate the times of sunrise, transit, and sunset, in hours (UTC)
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calcSunriseSunset(year, month, day, latitude, longitude, transit, sunrise, sunset, sun_altitude);
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// Print results
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char str[6];
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Serial.println(hoursToString(sunrise + utc_offset, str));
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Serial.println(hoursToString(transit + utc_offset, str));
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Serial.println(hoursToString(sunset + utc_offset, str));
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}
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void loop()
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{
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}
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// Rounded HH:mm format
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char * hoursToString(double h, char *str)
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{
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int m = int(round(h * 60));
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int hr = (m / 60) % 24;
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int mn = m % 60;
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str[0] = (hr / 10) % 10 + '0';
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str[1] = (hr % 10) + '0';
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str[2] = ':';
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str[3] = (mn / 10) % 10 + '0';
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str[4] = (mn % 10) + '0';
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str[5] = '\0';
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return str;
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}
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