DS3231 RTC Module body { font-family: Arial, sans-serif; line-height: 1.6; margin: 0; padding: 20px; } h1, h2, p { margin: 0 0 20px; } ul { list-style: none; padding: 0; } li { margin-bottom: 10px; } DS3231 I2C Precision RTC Real Time Clock Module Features: Highly accurate I2C real-time clock with an integrated temperature-compensated crystal oscillator. Battery input for uninterrupted timekeeping even during power failures. Available in commercial and industrial temperature ranges with a compact 16-pin package. Maintains time with second, minute, hour, day, date, month, and year tracking, including leap year corrections. 24-hour or 12-hour format with AM/PM indication, and two configurable alarm clocks. Automatic power supply switchover between main and backup power, ensuring continuous operation. Integrated digital temperature sensor with ±3°C accuracy, accessible via the I2C interface. Specifications: Size: 38mm x 22mm x 14mm Weight: 8g Operating Voltage: 3.3V - 5.5V Clock Chip: High-precision DS3231 Clock Accuracy: 2ppm from 0-40°C, error ~1 minute/month Two calendar alarms Programmable square-wave output Real-time clock valid till the year 2100 with leap year compensation Temperature Sensor Accuracy: ±3°C Memory: AT24C32 with 32K storage capacity IIC Bus Interface with 400KHz max transmission speed at 5V Cascadable with other IIC devices, configurable address by shorting A0/A1/A2 Includes a rechargeable CR2032 battery holder Packing: Single anti-static packaging Wiring Instructions (e.g., for Uno R3): SCL → A5 SDA → A4 VCC → 5V GND → GND Package Included: 1 x DS3231 AT24C32 IIC Precision RTC Real Time Clock Memory Module (battery not included)
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