.. currentmodule:: machine

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

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 millisecond 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

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