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Propeller 2

  • Configuring Visual Studio Code for Programming the P2 on Mac, Windows, and Linux
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  • DS3231 Real Time Clock I2C Demo

DS3231 Real Time Clock I2C Demo

Reading Time: < 1 min read

29127 DS3231 AT24C32 Real Time Clock Module
Description #

The DS3231 is a low-cost, precision I2C real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. The Parallax DS3231 AT24C32 Real Time Clock Module includes a battery backup, and maintains accurate timekeeping when power to the module is interrupted. 

This device was demonstrated extensively in the JonnyMac Beginner Series for Spin2 and the video is linked under additional resources.

To set the time and date, change the highlighted lines of code in jm_ds3231_demo.spin2 and load to Flash. 

pub initialize_rtc()

'' Manually set RTC registers to current time and date

  rtc.set_time($30, $04, $15)                     ' 3:04:30 pm

  rtc.set_calendar($07, $23, $01, $21)            ' Saturday, 23 JAN 2021
Parts Used #
  • P2 Edge Module
  • P2 Edge Breadboard
  • DS3231 AT24C32 Real Time Clock Module (29127)
Source Code #
  • jm_ds3231_demo-Archive
Programming Language #
  • Spin 2 and in-line PASM
Tools and Operating System #
  • Propeller Tool for Windows
Additional Resources #
  • Propeller 2 Spin Documentation
  • DS3231 Datasheet
  • Propeller 2 Live Forum: JonnyMac Beginner Series Part 3 (I2C and the DS3231 RTC)
Document Author #
  • Ken Gracey
Source Code Author #
  • Jon McPhalen
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Updated on September 27, 2026
XBee RF Transparent and API Mode DemoMultiple Servo Control (up to 64) Object
Table of Contents
  • Description
  • Parts Used
  • Source Code
  • Programming Language
  • Tools and Operating System
  • Additional Resources
  • Document Author
  • Source Code Author

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