34. RTC Real-time Module

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.

microbitplanetX\./images/05034_01.png

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


microbitplanetX\./images/05034_02.png

34.5. Quick to Start


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.

microbitplanetX\./images/05034_03.png

34.6. MakeCode Programming


Step 1

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

../_images/05001_04.png

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.

../_images/05001_05.png

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.

Step 2

Code as below:

../_images/05034_06.png

Result

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

34.7. Python Programming


Step 1

Download the package and unzip it: PlanetX_MicroPython

Go to Python editor

../_images/05001_072.png

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

Step 2

Reference

from microbit import *
from ds1307 import *

ds1307 = DS1307()
ds1307.Second(second=0)
while True:
    display.scroll(ds1307.Second())

Result

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

34.8. Relevant File


34.9. Technique File