24. Water Level Sensor(EF05023)

24.1. Introduction

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

24.2. Products Link

EELECFREAKS PlanetX Water Level Sensor

24.3. Characteristic

Designed in RJ11 connections, easy to plug.

24.4. Specification

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

24.5. Outlook

24.6. Quick to Start

24.6.1. 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.

24.7. MakeCode Programming

24.7.1. 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.

24.7.2. Step 2

24.7.3. Code as below:

24.7.4. Link

Link: https://makecode.microbit.org/_aAJboi9L1dc9

You may also download it directly below:

24.7.5. Result

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

24.8. Python Programming

24.8.1. Step 1

Download the package and unzip it: PlanetX_MicroPython

Go to Python editor

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.

24.8.2. Step 2

24.8.3. Reference

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

24.8.4. Result

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

24.9. Relevant File

24.10. Technique File