DS3231 High-Precision Real-Time Clock (RTC) Module for Arduino & Raspberry Pi

Overview 

The DS3231 is a low-cost, extremely accurate I2C real-time clock. It is the gold standard for projects where time drift is unacceptable. Because it uses a temperature-compensated crystal oscillator (TCXO), it maintains perfect time even when the environment temperature changes. It’s the perfect component for alarm clocks, time-stamping sensor data, or automating lights and equipment.

Key Features 

• Incredible Accuracy: Accurate to $\pm 2$ ppm from 0^C to +40^C.

• Battery Backup: Features a holder for a CR2032 battery, ensuring your project “remembers” the time even during a power outage or when the microcontroller is disconnected.

• Easy Interface: Uses the standard I2C (2-wire) protocol, making it compatible with almost any microcontroller (Arduino, ESP32, STM32, Raspberry Pi).

• Dual Alarms: Includes two programmable time-of-day alarms and a programmable square-wave output.

• Integrated Sensor: Includes an onboard digital temperature sensor for additional monitoring.

Technical Specifications

Popular DIY Projects

• Digital Clocks: Build a clock that never needs resetting.

• Data Loggers: Time-stamp your environmental sensor data (e.g., Temperature, Humidity).

• Smart Home Automation: Schedule your relay modules to trigger at specific times of the day.