Really tiny library to basic RTC and EEPROM (incorporated) functionality on Arduino and STM32 microcontrollers.
DS1307 and DS3231 RTCs are supported
AT24C32 EEPROM supported
(and compatibles)
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Get the ZIP.
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Rename to RTCLib.zip
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Install library on Arduino
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Optionally you can edit RTCLib.h to change I2C addresses or disable RTC setting functionality or EEPROM functionality,
Included on example folder, available on Arduino IDE.