81 lines
1.9 KiB
C++
81 lines
1.9 KiB
C++
//======================================================================================================================
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// SolarCalculator Library for Arduino example sketch: SolarTrackingTimeLib.ino
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//
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// Monitor the Sun's position in the sky for any location on Earth.
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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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#include <TimeLib.h>
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// Location
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double latitude = 45.55;
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double longitude = -73.633;
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int utc_offset = -5;
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// Refresh interval, in seconds
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int interval = 10;
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void setup()
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{
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Serial.begin(9600);
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// Set system time to compile time
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setTime(toUtc(compileTime()));
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// Set time manually (hr, min, sec, day, mo, yr)
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//setTime(0, 0, 0, 1, 1, 2022);
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}
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void loop()
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{
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static unsigned long next_millis = 0;
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// At every interval
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if (millis() > next_millis)
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{
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time_t utc = now();
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double az, el;
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// Calculate the solar position, in degrees
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calcHorizontalCoordinates(utc, latitude, longitude, az, el);
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// Print results
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Serial.print(F("Az: "));
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Serial.print(az);
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Serial.print(F("° El: "));
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Serial.print(el);
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Serial.println(F("°"));
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next_millis = millis() + interval * 1000L;
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}
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}
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time_t toUtc(time_t local)
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{
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return local - utc_offset * 3600L;
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}
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// Code from JChristensen/Timezone Clock example
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time_t compileTime()
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{
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const uint8_t COMPILE_TIME_DELAY = 8;
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const char *compDate = __DATE__, *compTime = __TIME__, *months = "JanFebMarAprMayJunJulAugSepOctNovDec";
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char chMon[4], *m;
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tmElements_t tm;
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strncpy(chMon, compDate, 3);
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chMon[3] = '\0';
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m = strstr(months, chMon);
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tm.Month = ((m - months) / 3 + 1);
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tm.Day = atoi(compDate + 4);
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tm.Year = atoi(compDate + 7) - 1970;
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tm.Hour = atoi(compTime);
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tm.Minute = atoi(compTime + 3);
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tm.Second = atoi(compTime + 6);
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time_t t = makeTime(tm);
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return t + COMPILE_TIME_DELAY;
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}
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