# Air Quality Combo **URL:** \ **Category:** Other\ **Created:** [May 14, 2025, 6:08am UTC](https://community.sparkfun.com/t/air-quality-combo/65091 "2025-05-14T06:08:39Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![AdreanaMendes](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/adreanamendes/32/9694_2.png) [@AdreanaMendes](https://community.sparkfun.com/u/AdreanaMendes)\ **Post date:** [May 14, 2025, 6:08am UTC](https://community.sparkfun.com/t/air-quality-combo/65091/1 "2025-05-14T06:08:39Z")
![image](https://canada1.discourse-cdn.com/sparkfun/original/2X/e/eadfa3821494f6beb36bfd538a55bd2b5e33910c.jpeg) Hi , may I know what is the code to run the Air Quality Combo to measure Co2 and the libraries needed to be downloaded in the Arduino software ? ---
**Author:** ![AdreanaMendes](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/adreanamendes/32/9694_2.png) [@AdreanaMendes](https://community.sparkfun.com/u/AdreanaMendes)\ **Post date:** [May 14, 2025, 6:54am UTC](https://community.sparkfun.com/t/air-quality-combo/65091/2 "2025-05-14T06:54:35Z")
![image](https://canada1.discourse-cdn.com/sparkfun/original/2X/d/de05a2a08f91a1433675047efd078ebc703f18bc.png) How come i have some error in the readings ? ---
**Author:** ![23044](https://avatars.discourse-cdn.com/v4/letter/2/bbce88/32.png) [@23044](https://community.sparkfun.com/u/23044)\ **Post date:** [May 14, 2025, 6:54am UTC](https://community.sparkfun.com/t/air-quality-combo/65091/3 "2025-05-14T06:54:57Z")
Is this to measure Co2? ---
**Author:** ![23044](https://avatars.discourse-cdn.com/v4/letter/2/bbce88/32.png) [@23044](https://community.sparkfun.com/u/23044)\ **Post date:** [May 14, 2025, 7:16am UTC](https://community.sparkfun.com/t/air-quality-combo/65091/4 "2025-05-14T07:16:41Z")
![image](https://canada1.discourse-cdn.com/sparkfun/original/2X/2/25db3ac75cc51c42e32474538d9bd04b785509c4.jpeg) There is error in this, what is the correct code to get the display for Co2, Humindity, VOC and PPM to appear ---
**Author:** ![paulvha](https://avatars.discourse-cdn.com/v4/letter/p/65b543/32.png) [@paulvha](https://community.sparkfun.com/u/paulvha)\ **Post date:** [May 14, 2025, 7:52am UTC](https://community.sparkfun.com/t/air-quality-combo/65091/5 "2025-05-14T07:52:46Z")
you have the wrong code. Look at the hookup guide [Introduction - SparkFun Indoor Air Sensor SCD41, SEN55 (Qwiic) Hookup Guide](https://docs.sparkfun.com/SparkFun_Indoor_Air_Quality_Sensor-SCD41-SEN55/introduction/#development-boards:micromod-products) ---
**Author:** ![AdreanaMendes](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/adreanamendes/32/9694_2.png) [@AdreanaMendes](https://community.sparkfun.com/u/AdreanaMendes)\ **Post date:** [May 14, 2025, 8:04am UTC](https://community.sparkfun.com/t/air-quality-combo/65091/6 "2025-05-14T08:04:05Z")
I check on the hook up guide and we cannot find any solutions . Can help guide me because I’m very new here ? I don’t know how to navigate the hook up guide , really need some help . We can’t find the exact code to display Co2 , Humidity , PPM and VOC . ---
**Author:** ![paulvha](https://avatars.discourse-cdn.com/v4/letter/p/65b543/32.png) [@paulvha](https://community.sparkfun.com/u/paulvha)\ **Post date:** [May 14, 2025, 8:11am UTC](https://community.sparkfun.com/t/air-quality-combo/65091/7 "2025-05-14T08:11:23Z")
download and install the software in the IDE and select one of the examples: [Software Setup - SparkFun Indoor Air Sensor SCD41, SEN55 (Qwiic) Hookup Guide/ software](https://docs.sparkfun.com/SparkFun_Indoor_Air_Quality_Sensor-SCD41-SEN55/software_setup/) For information about the IDE : [Installing Arduino IDE - SparkFun Learn](https://learn.sparkfun.com/tutorials/installing-arduino-ide/all) ---
**Author:** ![TS-Russell](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/ts-russell/32/6092_2.png) [@TS-Russell](https://community.sparkfun.com/u/TS-Russell)\ **Post date:** [May 14, 2025, 5:57pm UTC](https://community.sparkfun.com/t/air-quality-combo/65091/8 "2025-05-14T17:57:58Z")
You’ll navigate the hookup guide by working through the Table of contents on the left side of the screen; it looks like you should head here [Software Setup - SparkFun Indoor Air Sensor SCD41, SEN55 (Qwiic) Hookup Guide](https://docs.sparkfun.com/SparkFun_Indoor_Air_Quality_Sensor-SCD41-SEN55/software_setup/) to double-check you have all 3 installed and then click ‘examples’ on the left to begin working through/reading along with them ---
**Author:** ![dilshana](https://avatars.discourse-cdn.com/v4/letter/d/f4b2a3/32.png) [@dilshana](https://community.sparkfun.com/u/dilshana)\ **Post date:** [May 14, 2025, 10:22pm UTC](https://community.sparkfun.com/t/air-quality-combo/65091/9 "2025-05-14T22:22:40Z")
Please follow all the instructions given by TS-Russell. I believe that will solve the problems. By the way, if you are new, I think you can first try the MQ series of gas sensors. These are simple to use and can detect different type of gasses. To verify the data you get from air quality combo, you can always cross check them with MQ sensors’ output. ---
**Author:** ![AdreanaMendes](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/adreanamendes/32/9694_2.png) [@AdreanaMendes](https://community.sparkfun.com/u/AdreanaMendes)\ **Post date:** [May 21, 2025, 5:47am UTC](https://community.sparkfun.com/t/air-quality-combo/65091/10 "2025-05-21T05:47:02Z")
we alr installed the libraries and look up at the hook up guide , but we still couldn’t get the code to work and come out the results … we really need help to provide the code for CO2