34. RTC Real-time Module(EF05034)

34.1. Introduction

It is a clock module which can achieve counting for year, month, day, hour, minute and second by using the DS1307 clock chip.


34.2. Characteristic

  • Designed in RJ11 connections, easy to plug.

34.3. Specification

Item Parameter
SKU EF05034
Connection IIC
Type of Connection Analog output
Working Voltage 3.3V
Core IC DS1307

34.4. Outlook


34.5. Quick to Start

34.5.1. Materials Required and Diagram

  • Connect the RTC Real-time module to the IIC port and the OLED to another IIC port in the Nezha expansion board as the picture shows.


34.6. MakeCode Programming

34.6.1. Step 1

Click “Advanced” in the MakeCode drawer to see more choices.


We need to add a package for programming, . Click “Extensions” in the bottom of the drawer and search with “PlanetX” in the dialogue box to download it.


Note: If you met a tip indicating that the codebase will be deleted due to incompatibility, you may continue as the tips say or build a new project in the menu.

34.6.2. Step 2

34.6.3. Code as below:


34.6.5. Result

  • The seconds read by the RTC Real-time module displays on the OLED screen.

34.7. Python Programming

34.7.1. Step 1

Download the package and unzip it: PlanetX_MicroPython

Go to Python editor


We need to add ds1370.py for programming. Click “Load/Save” and then click “Show Files (1)” to see more choices, click “Add file” to add ds1370.py from the unzipped package of PlanetX_MicroPython.

../_images/05001_081.png ../_images/05001_091.png ../_images/05034_10.png

34.7.2. Step 2

34.7.3. Reference

from microbit import *
from ds1307 import *

ds1307 = DS1307()
while True:

34.7.4. Result

  • The seconds read by the RTC Real-time module displays on the micro:bit.

34.8. Relevant File

34.9. Technique File