A fork of Jeelab's fantastic RTC library
C++
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README.md

This is a fork of JeeLab's fantastic real time clock library for Arduino.

For details on using this library with an RTC module like the DS1307, PCF8523, or DS3231, see the guide at: https://learn.adafruit.com/ds1307-real-time-clock-breakout-board-kit/overview

To download. click the DOWNLOADS button to the right, and rename the uncompressed folder RTClib.

Place the RTClib folder in your arduinosketchfolder/libraries/ folder. You may need to create the libraries subfolder if its your first library. Restart the IDE.

Please note that dayOfTheWeek() ranges from 0 to 6 inclusive with 0 being 'Sunday'

Compatibility

MCU Tested Works Doesn't Work Not Tested Notes
Atmega328 @ 16MHz X
Atmega328 @ 12MHz X
Atmega32u4 @ 16MHz X Use SDA/SCL on pins D3 & D2
Atmega32u4 @ 8MHz X Use SDA/SCL on pins D3 & D2
ESP8266 X SDA/SCL default to pins 4 & 5 but any two pins can be assigned as SDA/SCL using Wire.begin(SDA,SCL)
Atmega2560 @ 16MHz X Use SDA/SCL on Pins 20 & 21
ATSAM3X8E X Use SDA1 and SCL1
ATSAM21D X
ATtiny85 @ 16MHz X
ATtiny85 @ 8MHz X
Intel Curie @ 32MHz X
STM32F2 X
  • ATmega328 @ 16MHz : Arduino UNO, Adafruit Pro Trinket 5V, Adafruit Metro 328, Adafruit Metro Mini
  • ATmega328 @ 12MHz : Adafruit Pro Trinket 3V
  • ATmega32u4 @ 16MHz : Arduino Leonardo, Arduino Micro, Arduino Yun, Teensy 2.0
  • ATmega32u4 @ 8MHz : Adafruit Flora, Bluefruit Micro
  • ESP8266 : Adafruit Huzzah
  • ATmega2560 @ 16MHz : Arduino Mega
  • ATSAM3X8E : Arduino Due
  • ATSAM21D : Arduino Zero, M0 Pro
  • ATtiny85 @ 16MHz : Adafruit Trinket 5V
  • ATtiny85 @ 8MHz : Adafruit Gemma, Arduino Gemma, Adafruit Trinket 3V