RTC using the internal millis() clock, has to be initialized before use. NOTE: this is immune to millis() rollover events. More...

#include <RTClib.h>

Public Member Functions
void	begin (const DateTime &dt)
	Start the RTC. More...

void	adjust (const DateTime &dt)
	Set the current date/time of the RTC_Millis clock. More...

DateTime	now ()
	Return a DateTime object containing the current date/time. Note that computing (millis() - lastMillis) is rollover-safe as long as this method is called at least once every 49.7 days. More...

Protected Attributes
uint32_t	lastUnix

uint32_t	lastMillis

Detailed Description

RTC using the internal millis() clock, has to be initialized before use. NOTE: this is immune to millis() rollover events.

Member Function Documentation

◆ begin()

void RTC_Millis::begin ( const DateTime & dt )

inline

Start the RTC.

Parameters

dt	DateTime object with the date/time to set

◆ adjust()

void RTC_Millis::adjust ( const DateTime & dt )

Set the current date/time of the RTC_Millis clock.

Parameters

dt	DateTime object with the desired date and time

◆ now()

DateTime RTC_Millis::now ( )

Return a DateTime object containing the current date/time. Note that computing (millis() - lastMillis) is rollover-safe as long as this method is called at least once every 49.7 days.

Returns: DateTime object containing current time

Member Data Documentation

◆ lastUnix

uint32_t RTC_Millis::lastUnix

protected

Unix time from the previous call to now().

This, together with lastMillis, defines the alignment between the millis() timescale and the Unix timescale. Both variables are updated on each call to now(), which prevents rollover issues.

◆ lastMillis

uint32_t RTC_Millis::lastMillis

protected

millis() value corresponding lastUnix.

Note that this is not the millis() value of the last call to now(): it's the millis() value corresponding to the last full second of Unix time preceding the last call to now().

The documentation for this class was generated from the following files:

src/RTClib.h
src/RTC_Millis.cpp

Public Member Functions

Protected Attributes