flex_DST

This algorithm is programmed to observe Daylight Saving Time based on a configuration given on the constructor. Since the rules for DST vary by country and territory, one can define the specific rules for any place.

requires RTClib

Function to figure out if we're in Daylight Saving Time, then adding an hour if we are in DST. Adapted from Andy Doro's library https://github.com/andydoro/DST_RTC

https://en.wikipedia.org/wiki/Daylight_saving_time_by_country This method doesn't check whether its 2am or not when the time change officially occurs.

The constructor receives the following parameters:

flex_DST(uint8_t irregularity, uint8_t startDay, uint8_t startMonth, uint8_t endDay, uint8_t endMonth)

irregularity

(optional) A number that chooses the kind of DST configuration desired

• 0 Sunday to Sunday. This is the default and this parameter can be ommited in most cases
• 1 Friday to Sunday
• 2 Friday to Friday
• 3 Specific begining and end dates

startDay

(compulsory) Specifies which day the DST begins

• 1 First Sunday/Friday of the month
• 2 Second Sunday/Friday of the month
• 3 Third Sunday/Friday of the month
• 4 Fourth Sunday/Friday of the month
• 5 Last Sunday/Friday of the month

In the case of irregularity equal to 3, this parameter represents the exact day to begin the DST.

startMonth

(compulsory) Specifies the month in which DST begins (1-12)

endDay

(compulsory) Same arguments as startDay

endMonth

(compulsory) Same arguments as startMonth

boolean checkDST(DateTime RTCTime)

Returns whether the given date is within the DST

DateTime calculateTime(DateTime RTCTime)

Checks if a given DateTime is within the DST and adjusts it accordingly