24. Water Level Sensor

24.1. Introduction

It is able to detect the water level with the on-board visible parallel wires.

../_images/05023_01.png

24.2. Characteristic


  • Designed in RJ11 connections, easy to plug.

24.3. Specification


Item Parameter
SKU EF05023
Connection RJ11
Type of Connection Analog output
Working Voltage 3.3V

24.4. Outlook


../_images/05023_02.png

24.5. Quick to Start


Materials Required and Diagram


  • Connect the Water lever sensor to J1 port and the OLED to the IIC port in the Nezha expansion board as the picture shows.

microbitplanetX\./images/05023_03.png

24.6. 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/05023_06.png

Result

  • The current value of the water level displays on the OLED screen.

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

../_images/05001_081.png ../_images/05001_091.png ../_images/05023_10.png

Step 2

Reference

from microbit import *
from enum import *
from waterlevel import *
waterlevel = WATERLEVEL(J1)
while True:
    display.scroll(int(waterlevel.get_waterlevel()))

Result

  • The current value of the water level displays on the micro:bit.

24.8. Relevant File


24.9. Technique File