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https://github.com/rodan/ds3231

arduino library for DS3231 RTC
https://github.com/rodan/ds3231

arduino-library

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arduino library for DS3231 RTC

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README

        

DS3231 library for the Arduino.

This library implements the following features:

- read/write of current time, both of the alarms,
control/status registers, aging register
- read of the temperature register, and of any address from the chip.

Author: Petre Rodan <[email protected]>
Available from: https://github.com/rodan/ds3231
License: GNU GPLv3

The DS3231 is a low-cost, extremely accurate I2C real-time clock
(RTC) with an integrated temperature-compensated crystal oscillator
(TCXO) and crystal.

support for ESP32 written by Helmut Tschemernjak