# CO2 Gas Sensor(EF05030) ## Introduction The higher the CO2 concentration is, the lower the output voltage would be. The CO2 probe is made with industrial grade which is high allergic to CO2 and anti-interference to alcohol and CO. ![](./images/05030_01.png) ## Products Link [ELECFREAKS PlanetX CO2 Sensor](https://shop.elecfreaks.com/products/elecfreaks-planetx-co2-sensor?_pos=1&_sid=6e55d1e3f&_ss=r) ## Characteristic Designed in RJ11 connections, easy to plug. ## Specification Item | Parameter :-: | :-: SKU|EF05030 Connection|RJ11 Type of Connection|Analog output Working Voltage|3.3V ## Outlook ![](./images/05030_02.png) ## Quick to Start ### Materials Required and Diagram Connect the CO2 sensor to J1 port and the OLED to the IIC port in the Nezha expansion board as the picture shows. ![](./images/05030_03.png) ## MakeCode Programming ### Step 1 Click "Advanced" in the MakeCode drawer to see more choices. ![](./images/05001_04.png) 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. ![](./images/05001_05.png) ***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. ### Step 2 ### Code as below: ![](./images/05030_06.png) ### Link Link: [https://makecode.microbit.org/_2mT2MxX236EM](https://makecode.microbit.org/_2mT2MxX236EM) You may also download it directly below:
### Result The detected value of the CO2 Gas sensor display on the OLED screen. ## Python Programming ### Step 1 Download the package and unzip it: [PlanetX_MicroPython](https://github.com/lionyhw/PlanetX_MicroPython/archive/master.zip) Go to [Python editor](https://python.microbit.org/v/2.0) ![](./images/05001_07.png) We need to add enum.py and CO2.py for programming. Click "Load/Save" and then click "Show Files (1)" to see more choices, click "Add file" to add enum.py and CO2.py from the unzipped package of PlanetX_MicroPython. ![](./images/05001_08.png) ![](./images/05001_09.png) ![](./images/05030_10.png) ### Step 2 ### Reference ``` from microbit import * from enum import * from co2 import * co2 = CO2(J1) while True: display.scroll(co2.get_co2()) ``` ### Result The detected value of the CO2 Gas sensor display on the micro:bit. ## Relevant File ## Technique File