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.