DS3231 Real Time Clock (RTC) Module

DS3231 Module is a Bread Board friendly extremely precise I2C real time clock Module. This module made using DS3231 RTC and AT24C32 EEPROM integrated with temperature compensated crystal oscillator. It also has a built in comparator which monitors the status of VCC to detect power failures and to automatically switch to backup power supply. AT24C32 provides 32,768 bits of serial EEPROM organized as 4096 words of 8 bits each. This gives you 32Kb of non-volatile memory for your projects. This module can be easily interfaced with Arduino Boards, Raspberry Pi and all Microcontrollers.

The DS3231 Real Time Clock (RTC) module is an upgraded version of the DS1307, offering higher accuracy and additional features. Here are some key features and details about the DS3231 RTC module:

Key Features:

1. High Accuracy: The DS3231 is an extremely accurate RTC with an integrated temperature-compensated crystal oscillator (TCXO) and crystal.
2. Temperature Compensation: Provides a stable time reference by compensating for temperature variations.
3. I2C Interface: Communicates with microcontrollers via the I2C bus.
4. Battery Backup: Maintains accurate timekeeping even when the main power supply is interrupted, thanks to a backup battery (typically a CR2032 coin cell).
5. Built-in Temperature Sensor: Measures ambient temperature with an accuracy of ±3°C and provides this data over the I2C interface.
6. Programmable Alarms: Includes two programmable time-of-day alarms and a programmable square-wave output.
7. Low Power Consumption: Consumes minimal power, making it suitable for battery-operated devices.

Pin Configuration:

• VCC: Power supply (typically 3.3V to 5V).
• GND: Ground.
• SCL: Serial Clock Line for I2C communication.
• SDA: Serial Data Line for I2C communication.
• 32kHz: Output pin for a 32.768 kHz square wave.
• SQW: Square Wave/Output pin that can be used for outputting a programmable square wave or alarm.

Basic Operation:

1. Connecting to a Microcontroller: The DS3231 RTC module is connected to the microcontroller via the I2C bus (SCL and SDA lines). The microcontroller can then read from and write to the RTC to get the current time or set a new time.
2. Setting the Time: To set the time, the microcontroller sends the desired time data over the I2C bus to the DS3231.
3. Reading the Time: To read the current time, the microcontroller requests time data from the DS3231 over the I2C bus.
4. Using Alarms: The DS3231 allows setting two independent alarms that can trigger events or wake up the microcontroller.

Common Applications:

• Clocks and Watches: Provides accurate timekeeping for digital clocks and watches.
• Data Loggers: Timestamping data entries in data logging applications.
• Alarm Systems: Scheduling tasks or triggering events at specific times.
• Home Automation: Time-based control of appliances and systems in smart homes.

Technical Specifications:

• Operating voltage :3.3 – 5 .5 V
• Clock chip: high-precision clock chip DS3231
• Clock Accuracy :0-40 ℃ range, the accuracy 2ppm, the error was about 1 minute
• Memory chips: AT24C32 (storage capacity 32K)
• Calendar alarm clock with two
• Programmable square-wave output
• Real time clock generator seconds, minutes, hours, day, date, month and year timing and provide valid until the year 2100 leap year compensation
• Chip temperature sensor comes with an accuracy of ± 3 ℃
• I2C bus interface, the maximum transmission speed of 400KHz (working voltage of 5V)

Package Includes:

• 1 Piece-DS3231 Real Time Clock (RTC) Module