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.


33.3. Characteristic#

Designed in RJ11 connections, easy to plug.

33.4. Specification#

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

33.5. Outlook#


33.6. Quick to Start#

33.6.1. 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.

33.7. MakeCode Programming#

33.7.1. 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.

33.7.2. Step 2#

33.7.3. Code as below:#


33.7.5. Result#

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

33.8. Python Programming#

33.8.1. 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

33.8.2. Step 2#

33.8.3. Reference#

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

33.8.4. Result#

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

33.9. Relevant File#

33.10. Technique File#