6. Soil Moisture Sensor

6.1. Introduction

Soil Moisture Sensor aims to detect the amount of the moisture in its surrounding soil.

../_images/05005_01.png

6.2. Characteristic


  • Designed in RJ11 connections, easy to plug.

6.3. Specification


Item Parameter
SKU EF05005
Connection RJ11
Type of Connection Analog output
Working Voltage 3.3V

6.4. Outlook


../_images/05005_02.png

6.5. Quick to Start


Materials Required and Diagram


  • Connect the Soil moisture sensor to J1 port and the OLED module to IIC port in the Nezha expansion board as the picture shows.

../_images/05005_03.png

6.6. 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/05005_06.png

Result

  • The value of the current soil moisture display on the OLED module.

6.7. Python Programming


Step 1

Download the package and unzip it: PlanetX_MicroPython

Go to Python editor

../_images/05001_072.png

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

../_images/05001_081.png ../_images/05001_091.png ../_images/05005_10.png

Step 2

Reference


from microbit import *
from enum import *
from soilhumidity import *

while True:
    soilhumidity = SOILHUMIDITY(J1)
    soilhumidity_value = int(soilhumidity.get_soilhumidity())
    display.scroll(str(soilhumidity_value))        

Result

  • The value of the current soil moisture display on the micro:bit.

6.8. Relevant File


6.9. Technique File