When time needs to be set on a new device, or after a power loss, the Serial.println('RTC lost power, let's set the time!') While (!Serial) // wait for serial port to connect.

Date and time functions using a DS3231 RTC connected via I2C and Wire libĬhar daysOfTheWeek = Also, this Arduino sketch read time and data from DS3231 RTC module and prints in on Arduino serial monitor. This example code performs time settings. Otherwise, RTClib will not work properly. We recommend you to install all dependencies by clicking on install button. When you click on the install button, you may get a message that RTClib may require other libraries dependencies which is currently not installed in your Arduino IDE. Select RTClib by Adafruit and click on the install button. But the one that we will use in this tutorial is RTClib by Adafruit.

Search for “RTClib” by typing in the search bar. The schematic of the module is provided to understand the connections which may turn helpful while repairing the module:Īfter that, this window library manager window will appear. Switches automatically from a power source to an in-built battery source.Maintains seconds, minutes, hours, days, weeks, months, years information.An aging trim register to set a user-provided value as an offset with reference to the factory value.RTC can be used either in 12hrs or 24hrs format.32 bytes of EEPROM for to read/write or to save data.A dual-directional, 400 kHz of I2C interface for speedy transmission.A battery backup to stay updated even if there is no power.A programmable Square-wave output as per requirement.Some of the detailed features are listed below:

32K: This pin is used for a reference clock.ĭS3231 RTC Module Features and Specifications.SCL: A serial clock line used to synchronize data transmissions.SQW: It is used to generate square wave or to be used as an interrupt for the alarms.The pin configuration detail in tabular is mentioned below: Pin Name Let us discuss the pinout of the DS3231 Real-time Module.

Rtc ic ds3231 wire library