RTC DS3231M Module - I2C

With this RTC (Real Time Clock) you can easily keep track of the time. In addition, this module contains a battery holder in which a CR-1220 battery can be placed. When the main power supply of the module fails, the battery will temporarily take over so that the RTC can continue to operate. This module is also a temperature-compensated RTC, using the built-in digital temperature sensor.

Specifications:

• Supply voltage: 2.3-5.5V DC
• Signal voltage: 2.3-5.5V
• Communication protocol: I2C
• RTC chip: DS3231M
• Clock Accuracy: ~5ppm (~0.432 second/day)
• Battery*: CR1220

*The module also works without a battery, it is only necessary if the RTC has to continue if the power supply fails.

Package contents:

• 1x RTC DS3231M Module
• 1x Male header set

For more information about how to use this RTC in combination with Arduino look here: Arduino Time library.

Note: A battery may be included, but we cannot guarantee this. If included, the battery is of questionable quality. If you want to use the module with a battery, we therefore recommend ordering a good battery: CR1220