.. _machine.RTC: class RTC -- real time clock ============================ The RTC is and independent clock that keeps track of the date and time. Example usage:: rtc = machine.RTC() rtc.init((2014, 5, 1, 4, 13, 0, 0, 0)) print(rtc.now()) Constructors ------------ .. class:: machine.RTC(id=0, ...) Create an RTC object. See init for parameters of initialization. Methods ------- .. method:: rtc.init(datetime) Initialise the RTC. Datetime is a tuple of the form: ``(year, month, day[, hour[, minute[, second[, microsecond[, tzinfo]]]]])`` .. method:: rtc.now() Get get the current datetime tuple. .. method:: rtc.deinit() Resets the RTC to the time of January 1, 2015 and starts running it again. .. method:: rtc.alarm(id, time, /*, repeat=False) Set the RTC alarm. Time might be either a milllisecond value to program the alarm to current time + time_in_ms in the future, or a datetimetuple. If the time passed is in milliseconds, repeat can be set to ``True`` to make the alarm periodic. .. method:: rtc.alarm_left(alarm_id=0) Get the number of milliseconds left before the alarm expires. .. method:: rtc.cancel(alarm_id=0) Cancel a running alarm. .. method:: rtc.irq(\*, trigger, handler=None, wake=machine.IDLE) Create an irq object triggered by a real time clock alarm. - ``trigger`` must be ``RTC.ALARM0`` - ``handler`` is the function to be called when the callback is triggered. - ``wake`` specifies the sleep mode from where this interrupt can wake up the system. Constants --------- .. data:: RTC.ALARM0 irq trigger source