DS3231 High Precision Real Time Clock (RTC) with battery

Overview

The DS3231 is a highly accurate, I2C-integrated real-time clock (RTC) module that combines a temperature-compensated crystal oscillator (TCXO) and a crystal in a single package. This ensures exceptional timekeeping precision, even in fluctuating temperatures. The module includes a battery holder for a CR2032 coin cell, allowing it to maintain time and date for years even when the main power is disconnected. It is the go-to choice for projects that require reliable timekeeping, such as data loggers, timers, and alarm systems.

Key Features

• High Precision: ±2 ppm accuracy from 0°C to +40°C, and ±3.5 ppm from -40°C to +85°C.
• I2C Interface: Simple 2-wire interface for easy integration with microcontrollers like Arduino, ESP32, Raspberry Pi, and STM32.
• Battery Backup: CR2032 coin cell holder ensures continuous timekeeping without external power.
• Temperature Compensated: Internal TCXO eliminates the need for external crystal calibration.
• Alarm Functions: Two programmable time-of-day alarms and a programmable square-wave output.
• Digital Temp Sensor: Outputs a precise temperature reading with ±3°C accuracy.
• Low Power Consumption: Designed for battery-powered applications.

Technical Specifications

• Supply Voltage: 2.3V to 5.5V
• Timekeeping Current: 3.0µA (typical) at 3.3V
• I2C Address: 0x68 (default)
• Temperature Accuracy: ±3°C
• Clock Accuracy: ±2 ppm (0°C to +40°C)
• Operating Temperature Range: -45°C to +85°C
• Battery: CR2032 (not included)
• Module Dimensions: Approx. 38mm x 22mm x 15mm
• Pinout: VCC, GND, SDA, SCL, SQW, 32K

Applications & Use Cases

• Data Logging: Timestamp sensor readings accurately for long-term projects.
• Alarm Systems: Trigger events at precise times with the built-in alarms.
• Clocks and Timers: Build digital clocks, timers, and countdown devices.
• IoT Devices: Keep accurate time for cloud synchronization and scheduling.
• Home Automation: Control lighting, irrigation, or other systems based on time.
• Educational Projects: Perfect for learning about I2C communication and real-time systems.

What's Included

• 1x DS3231 RTC Module (with battery holder, no battery included)
• 1x Pin headers (may require soldering)

Compatibility

• Microcontrollers: Arduino (Uno, Mega, Nano), ESP32, ESP8266, Raspberry Pi, STM32, and any I2C-capable device.
• Libraries: RTClib (Adafruit), DS3231 (by Henning Karlsen) – widely available.
• Battery: CR2032 coin cell (not included, widely available in Egypt).

MOKWN Recommendation

For makers and engineers in Egypt who need reliable timekeeping, the DS3231 is the industry standard. Its high precision and battery backup make it indispensable for data logging and automation projects. Pair it with our Arduino or ESP32 boards and a CR2032 battery for a complete solution. Order now and keep your projects perfectly on time!