Ultimate DS3231 RTC Module ZS-042 – Reliable Battery Backup Clock for Arduino, ESP32

�� Overview The DS3231 ZS-042 real-time clock (RTC) is a highly accurate and temperature-compensated timekeeping module designed for embedded and microcontroller applications. Its onboard CR2032 battery backup ensures consistent operation even during power failures. �� Key Features: High-precision RTC with crystal oscillator Built-in temperature compensation Battery backup for continuous operation I2C interface for easy integration 32kHz and programmable square-wave output Compatible with 3.3V and 5V logic (Arduino, ESP32, STM32, Raspberry Pi) �� Common Applications: Data logging Timed automation projects Real-time clocks in embedded systems Alarm systems IoT scheduling applications �� Video Tutorial Want to learn how to use this module in your project? Watch our detailed step-by-step tutorial on YouTube:�� How to use DS3231 RTC Module with Arduino and ESP32 This tutorial covers wiring, coding, and testing the DS3231 RTC module using Arduino IDE, and is beginner-friendly. �� Pinout Summary: SCL, SDA: I2C Communication VCC: Power input (3.3V or 5V) GND: Ground 32K: 32.768kHz output SQW: Programmable square wave output For detailed technical specifications, check out the official DS3231 datasheet (PDF). Looking for a compatible microcontroller?Check out the Arduino UNO R3 with USB Cable — perfect for pairing with this RTC module.