43 lines
1.5 KiB
Arduino
43 lines
1.5 KiB
Arduino
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// RTC timestamp bias: Arduino with DS1307RTC exmaple
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// https://gitlab.com/simplemicrocontrollers/rtctimestampbias
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#include <Thread.h>
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#include <DS1307RTC.h>
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// Time bias correction variables:
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long correctionCheck = 43200000; // Offset in one second per the number of milliseconds
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int correctionBias = 1;
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Thread correctionThread = Thread(); // Time bias correction thread
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void setup() {
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Serial.begin(9600); // Initializes the Serial connection @ 9600 baud for debug
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while (!Serial); // Wait until Arduino Serial Monitor opens
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setSyncProvider(RTC.get); // The function to get the time from the RTC
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if(timeStatus()!= timeSet) { // Checking the time setting
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Serial.println("Unable to sync with the RTC");
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} else {
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// Serial.println("RTC has set the system time");
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Serial.println(now()); // Sending a timestamp to the serial port if a RTC is detected
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}
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// Time bias correction thread initialization:
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correctionThread.onRun(correctionLoop);
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correctionThread.setInterval(correctionCheck);
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}
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void loop() {
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// Threads:
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if (correctionThread.shouldRun())
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correctionThread.run();
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}
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void correctionLoop() {
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tmElements_t RTCtime;
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RTC.read(RTCtime);
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time_t RTCtimestamp;
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RTCtimestamp = makeTime(RTCtime);
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tmElements_t timeNew;
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time_t newTimestamp = RTCtimestamp - correctionBias;
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breakTime(newTimestamp, timeNew);
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RTC.write(timeNew);
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setSyncProvider(RTC.get);
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}
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