6. Soil Moisture Sensor(EF05005)

6.1. Introduction

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

6.2. Products Link

ELECFREAKS PlanetX Soil Moisture Sensor

6.3. Characteristic

Designed in RJ11 connections, easy to plug.

6.4. Specification

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

6.5. Outlook

6.6. Quick to Start

6.6.1. 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.

6.7. MakeCode Programming

6.7.1. 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.

6.7.2. Step 2

6.7.3. Code as below:

6.7.4. Link

Link: https://makecode.microbit.org/_91HWRxe2T5De

You may also download it directly below:

6.7.5. Result

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

6.8. Python Programming

6.8.1. Step 1

Download the package and unzip it: PlanetX_MicroPython

Go to Python editor

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.

6.8.2. Step 2

6.8.3. 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))        

6.8.4. Result

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

6.9. Relevant File

6.10. Technique File