Timing
Clock classes for Arduino that provide an auto-incrementing count of seconds since a known epoch which can be synchronized from external sources such as an NTP server, a DS3231 RTC chip, or an STM32 RTC chip.
This is a companion library to the AceTime library whose epoch defaults to 2050-01-01T00:00:00 UTC. This allows time zone calculations to be valid from the year 2000 to 2100 which matches the range of many hardware RTC chips that use a 2-digit year offset from the year 2000.
Maintainer: Brian T. Park
This library is compatible with all architectures so you should be able to use it on all the Arduino boards.
To use this library, open the Library Manager in the Arduino IDE and install it from there.