RTC Library
This library allows an enables an
Arduino based on SAMD architectures (es. Zero, MKRZero or MKR1000 Board) to control and use the internal RTC (
Real Time Clock). A
real-
time clock is a
clock that keeps track of the
current time and that can be used in order to program actions at a certain
time.
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It accepts a single integer (or number) argument. This number represents the time (measured in milliseconds). ... The micros() function returns the number of microseconds from the time, the Arduino board begins running the current program. This number overflows i.e. goes back to zero after approximately 70 minutes.