MQ2 Gas Sensor(EF05031)
31. MQ2 Gas Sensor(EF05031)#
MQ2 Gas sensor is used in gas leakage detecting equipments in consumer and industry markets, this sensor is suitable for detecting LPG, i-butane, propane, methane ,alcohol, hydrogen and smoke.
Designed in RJ11 connections, easy to plug.
|Type of Connection||Analog output|
31.6. Quick to Start#
31.6.1. Materials Required and Diagram#
Connect the MQ2 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.
31.7. MakeCode Programming#
31.7.1. 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.
31.7.2. Step 2#
31.7.3. Code as below:#
The value detected from MQ2 Gas sensor displays on the OLED screen.
31.8. Python Programming#
31.8.1. Step 1#
Download the package and unzip it: PlanetX_MicroPython
Go to Python editor
We need to add enum.py and smoke.py for programming. Click “Load/Save” and then click “Show Files (1)” to see more choices, click “Add file” to add enum.py and smoke.py from the unzipped package of PlanetX_MicroPython.
31.8.2. Step 2#
from microbit import * from enum import * from smoke import * smoke = SMOKE(J1) while True: display.scroll(smoke.get_smoke())
The value detected from MQ2 Gas sensor displays on the micro:bit.