Build CO2-probe/sensor with Nicla Sense ME- but how?

Projects General Guidance
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Hi everyone,

maybe you could help me out. Like the topic is indicating it, my project is to build a CO2-probe with a Nicla Sense ME sensor in a DIY way, but how?

Short briefing: My suitcase is to measure the CO2 concentration (ppm) and the temperature of the air in a glass bottle or container. It could be very humid too. So, I guess, I need a CO2-probe, but I found nothing on the marked what could work for me or its just not affordable for my tiny DIY project.

So, I ll build my CO2-porbe in DIY style.

During my browse on the web and on YouTube, a came across of Arduino. I found the Nicla Sense ME That's why I post here my project. I am a total beginner.

1)Do you know which parts I require, to build such a CO2-probe with a Nicla Sense ME?

  1. May you have an idea for step-by-step instruction/tutorial to build the probe?

  2. If 1),2) is not the case, do may know somebody where I could reach out to build my device?

I would be glad to hear back from you. Best, Janosch

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Do You have technical documentation for that Nicla thing?

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Hi Railroader thank you that you come back to me. I guess, I do have a kind of technical documentation. That provides Arduino by its product page of Nicla: Nicla Sense ME — Arduino Official Store

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The BME688 gas sensor on the Nicla Sense ME is not specific for CO2, or very accurate.

You should carefully read the BME688 sensor data sheet to learn what it actually does, and decide whether it is useful for your project.

For reasonably accurate CO2 measurements, consider an NDIR sensor specific for CO2. Cheaper sensors of that general type are available, e.g. Adafruit SCD-30 - NDIR CO2 Temperature and Humidity Sensor [STEMMA QT / Qwiic] : ID 4867 : $58.95 : Adafruit Industries, Unique & fun DIY electronics and kits

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What accuracy /concentration of CO2 are you looking at and do you need to do it without altering the bottles content .
I’m guessing this is a school project , so you really have to do some research yourself on the techniques to measure CO2 so you can justify the method of your choice against others you have seen .
( rather than just ask others …)
Is this part of a class on electronics/coding ? Or could you use other techniques ?
What’s your experience in building up to this ?
Most of your marks will go on how you’ve approached , researched and built the project …

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Hi Jremington, thank you that get back to me.
Good to know: :slight_smile: I am just starting to get into it with the CO2. I have been on Adafruits website already. Do you recommend SCD-30 or SCD-40 to start with? Just in theory would buy the SCD-30 how could I get the signals I mean the ppm shown on display? What parts like a probe could I connect with? I have read sandbox electronics. How could I protect the sensor against humidity?

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Hi hammy, thank you that you get back to me. Nope! No school project, no calss no marks. Come on hammy! That's a form, not a blog! So why no posting a question like everyone.

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Adafruit has excellent "Getting Started" tutorials for their sensors. Study the material and decide for yourself.

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Amazing! Cheers Jremington! I appreciate your help. You get me one step closer to build it.

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Sorry if I got that wrong but the content suggested it . Suitcase ?? .
What’s the measurement for ?

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No worries! :slight_smile: Basically, l am a hobbyist blessed with a lot of curiosity, and I like to build and test new things. So, I guess, like everyone here. Once again, would like to measure CO2-conctertaion ppm of the air in glass bottle or container. My sourdough or my plants or during beer brewing I would like to know how much CO2 concentration is there. So I thought why not to building my own CO2-probe. Best,
Janosch

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@hammy sorry missed it, the on-going project now is to measure the CO2-concetration in bottle after my SodaStream push. :wink:

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