DS3231 RTC Module Precise Real Time Clock I2C with AT24C02 EEPROM

DS3231 RTC Module — Precise Real Time Clock with I2C & AT24C02 EEPROM

The DS3231 RTC Module is a high-precision, low-cost real-time clock module widely used in Arduino, ESP32, NodeMCU, and Raspberry Pi projects. It features the DS3231 temperature-compensated crystal oscillator (TCXO) for exceptional timekeeping accuracy, an integrated AT24C02 EEPROM for non-volatile data storage, and a CR2032 battery backup to maintain time even when the main power is off.

Whether you’re building a digital clock, data logger, alarm system, or scheduled automation project, the DS3231 is the most reliable RTC module available for hobbyists and engineers in India.

Key Features

• ⏱️ High Accuracy: ±2ppm from 0°C to +40°C — less than 1 minute drift per year
• 🔋 Battery Backup: CR2032 coin cell keeps time running when power is off
• 💾 AT24C02 EEPROM: 256 bytes of non-volatile memory for storing settings or data
• 📶 I2C Interface: Simple 2-wire communication (SDA + SCL) — easy to use with any microcontroller
• 🌡️ Built-in Temperature Sensor: ±3°C accuracy — readable via I2C
• 📅 Full Date & Time: Seconds, minutes, hours, day, date, month, year with leap year compensation up to 2100

Specifications

• RTC IC: DS3231SN
• EEPROM: AT24C02 — 256 bytes, I2C
• Interface: I2C (address 0x68 for RTC, 0x57 for EEPROM)
• Operating Voltage: 3.3V – 5.5V
• Accuracy: ±2ppm (0°C to +40°C)
• Battery: CR2032 (not included)
• Temperature Sensor: ±3°C accuracy
• Pins: VCC, GND, SDA, SCL, SQW, 32K

Compatible With

• Arduino UNO, Nano, Mega, Pro Mini
• ESP32, ESP8266, NodeMCU
• Raspberry Pi (3.3V I2C)
• STM32 and other I2C-capable microcontrollers

Use Cases

• Digital clock and calendar display
• Data logger with timestamped sensor readings
• Alarm clock and scheduled relay control
• Attendance and access control systems
• IoT devices requiring accurate time synchronisation

Order now from Xsortex HUB and get fast delivery across India. Compatible with the popular RTClib Arduino library — get started in minutes.