22. UV Sensor(EF05021)

22.1. Introduction

It is able to measure the total UV intensity of the sunlight.


22.2. Characteristic

  • Designed in RJ11 connections, easy to plug.

22.3. Specification

Item Parameter
SKU EF05021
Connection RJ11
Type of Connection Analog output
Working Voltage 3.3V

22.4. Outlook


22.5. Quick to Start

22.5.1. Materials Required and Diagram

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


22.6. MakeCode Programming

22.6.1. 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.

22.6.2. Step 2

22.6.3. Code as below:


22.6.5. Result

  • The detected value from the UV sensor displays on the OLED screen.

22.7. Python Programming

22.7.1. Step 1

Download the package and unzip it: PlanetX_MicroPython

Go to Python editor


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

../_images/05001_081.png ../_images/05001_091.png ../_images/05021_10.png

22.7.2. Step 2

22.7.3. Reference

from microbit import *
from enum import *
from uvlevel import *
uvlevel = UVLEVEL(J1)
while True:

22.7.4. Result

  • The detected value from the UV sensor displays on the micro:bit.

22.8. Relevant File

22.9. Technique File