DS3231 module, real-time RTC clock, AT23C32 memory, 32 kHz, for Arduino

RTC DS3231 clock module with AT23C32 memory

RTC DS3231 is a highly accurate real-time clock module. The device has built-in memory and an integrated crystal. The module is universal and works very well with Arduino, ESP8266, ESP32, and Raspberry Pi.

It provides precise readings of seconds, minutes, hours, days, months, and years. Communication with the module uses the popular I2C bus, which greatly simplifies integration with various systems. The module is powered from 3V to 5.5V and includes a built-in square-wave generator.

NOTE: When powered externally at 5V, that voltage is passed to the battery connector. You must then use only a rechargeable battery (e.g. an LIR2032 rechargeable cell instead of a standard CR2032 battery).

Key technical specifications

• Supply voltage: 3V - 5.5V
• Communication interface: I2C
• Time readout: seconds, minutes, hours, days, months, years
• Features: built-in memory and integrated crystal
• Additional functions: built-in square-wave generator

Example applications

1. Smart home systems that need precise scheduling
2. Weather stations and data loggers recording measurements over time
3. Electronic clocks, alarms, and information displays
4. Automatic lighting or irrigation control systems
5. Industrial equipment and systems that log machine runtime

Benefits of choosing the DS3231 module

• High accuracy: the integrated crystal provides much better timekeeping accuracy
• Easy integration: simple I2C communication makes connection to Arduino or ESP32 straightforward
• Versatility: a wide supply range from 3V to 5.5V allows use with many boards
• All-in-one: built-in memory lets you store extra configuration and data
• Reliability: battery backup keeps time running when main power is lost