DS3231 Real Time Clock Module by Azuocn 6pcs High Precision I2C RTC

Description

Product Overview

The Azuocn DS3231 Real Time Clock (RTC) Module is engineered for developers who need reliable, high‑precision timekeeping in embedded systems. Measuring just 38 mm by 22 mm by 14 mm and weighing only 8 g, the module packs a powerful feature set into a compact footprint that fits comfortably on any breadboard or custom PCB. It operates across a wide voltage range of 3.3 V to 5.5 V, making it compatible with both 3.3 V and 5 V logic environments commonly found in Arduino, Raspberry Pi, and other microcontroller platforms.

The core of the module is the DS3231 crystal‑compensated oscillator, which maintains time with an accuracy of ±2 ppm (approximately ±1 minute per year). Complementing the oscillator is an integrated AT24C32 EEPROM that stores time and calendar data when the main supply is interrupted, ensuring that the clock resumes with the correct time after power is restored. The module also includes a digital temperature sensor that can be queried over the same I²C bus, providing temperature readings with an accuracy of ±3 °C. Two programmable calendar alarms and a square‑wave output give developers flexible options for triggering events, while the automatic power‑management circuit seamlessly switches between the main supply and a backup coin cell without any software intervention.

Usage

Designed for a broad range of applications, this RTC module excels in data‑logging stations, environmental monitoring rigs, home‑automation controllers, and any project that requires precise timestamps. Hobbyists building weather stations can use the built‑in temperature sensor to correlate ambient conditions with time‑stamped data. In industrial settings, the dual alarms can be programmed to trigger maintenance reminders or safety shutdowns at specific times of day. The module’s I²C interface allows multiple devices to share the same bus, enabling complex multi‑sensor configurations without additional wiring complexity.

Because the module supports both 24‑hour and 12‑hour formats with AM/PM indication, it can be integrated into user‑facing displays that need to show time in a familiar format. Its low power consumption and automatic battery backup make it ideal for remote IoT nodes that may experience intermittent power. Whether you are prototyping a smart garden controller, a time‑synchronized LED display, or a precision motor controller, the DS3231 module provides a dependable time base that simplifies software development and improves overall system reliability.

Why Choose Us

Choosing the Azuocn DS3231 module means selecting a product that combines rigorous engineering with user‑centric design. Each unit undergoes thorough testing for accuracy, voltage tolerance, and endurance to meet the demanding standards of industrial and scientific applications. The inclusion of the AT24C32 EEPROM distinguishes our module from basic RTC boards by safeguarding time data against power loss, a feature often overlooked in lower‑cost alternatives.

Our commitment to quality extends beyond the hardware. Azuocn provides comprehensive documentation, example code for Arduino and Raspberry Pi, and responsive technical support that assists developers from concept to deployment. The module’s robust construction—featuring a solid‑state crystal, protective coating, and reliable solder joints—ensures long‑term operation even in harsh environments. When you purchase a 6‑piece kit, you receive a complete set of modules ready for immediate integration, reducing lead times and inventory costs for small‑scale production runs.

Key Features

• High‑precision DS3231 oscillator keeps time within ±2 ppm for year‑long accuracy.
• Integrated AT24C32 EEPROM preserves date and time data during power outages.
• Dual programmable alarms and square‑wave output enable flexible event scheduling.
• Built‑in temperature sensor provides real‑time thermal readings via I²C.
• Automatic power‑management circuit switches seamlessly to backup battery without software.
• Compact 38 mm × 22 mm × 14 mm form factor fits tight spaces on prototype boards.
• Wide operating voltage range (3.3 V‑5.5 V) ensures compatibility with most microcontrollers.
• Dedicated Azuocn support team offers firmware examples, troubleshooting, and warranty assistance.

FAQ

What voltage does the module require?

The DS3231 module operates from 3.3 V to 5.5 V, making it suitable for both 3.3 V and 5 V logic systems such as Arduino Uno, Nano, and Raspberry Pi models.

How does the backup battery work?

An on‑board power‑management circuit detects loss of the main supply and automatically switches to a connected coin‑cell battery, keeping the RTC running and preserving time data in the AT24C32 EEPROM.

Can I use the temperature sensor for environmental monitoring?

Yes, the integrated temperature sensor can be read over the I²C bus just like the time registers, allowing you to log temperature alongside timestamps in a single communication session.

Is the module compatible with both Arduino and Raspberry Pi?

Absolutely. The I²C interface follows the standard SMBus protocol, so you can connect the module to any board that supports I²C, including Arduino, Raspberry Pi, ESP32, and many others.

Do I need to solder any components?

The module comes with pre‑soldered header pins for easy insertion into breadboards or perfboards. No additional soldering is required unless you wish to integrate it directly onto a custom PCB.