33. MQ5 Gas Sensor(EF05033)

33.1. Introduction

MQ5 Gas sensor has a good sense to liquefied gas, natural gas and coal gas that are widely used in cities, but it doesn’t work on ethanol or smoke.


33.2. Characteristic

  • Designed in RJ11 connections, easy to plug.

33.3. Specification

Item Parameter
SKU EF05033
Connection RJ11
Type of Connection Analog output
Working Voltage 3.3V

33.4. Outlook


33.5. Quick to Start

33.5.1. Materials Required and Diagram

  • Connect the MQ5 Gas sensor to J1 port and the OLED to the IIC port in the Nezha expansion board as the picture shows.


Note: A preheating for 3 minutes after powering on is required before using.

33.6. MakeCode Programming

33.6.1. 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.

33.6.2. Step 2

33.6.3. Code as below:


33.6.5. Result

  • The value detected from MQ5 Gas sensor displays on the OLED screen.

33.7. Python Programming

33.7.1. Step 1

Download the package and unzip it: PlanetX_MicroPython

Go to Python editor


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

../_images/05001_081.png ../_images/05001_091.png ../_images/05033_10.png

33.7.2. Step 2

33.7.3. Reference

from microbit import *
from enum import *
from co import *
co = CO(J1)
while True:

33.7.4. Result

  • The value detected from MQ5 Gas sensor displays on the micro:bit.

33.8. Relevant File

33.9. Technique File