Indoor ESPHome Air Quality Monitor

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Hey everyone,

I’m wanted to share my latest project with you - an indoor air quality sensor that integrates with ESPHome and provides accurate measurements of multiple air quality indicators. After a lot of research, I struggled to find a product that met my requirements, so I decided to make my own.

My goal was to create an air quality sensor that could accurately measure:

  • Particulate matter (PM2.5 & PM10)
  • Carbon dioxide (eCO2)
  • VOCs (airborne chemicals)
  • Humidity
  • Temperature
  • Air pressure
  • Air quality index

During the design process, I realised that monitoring other factors like carbon monoxide would be beneficial. To accommodate this, I made our board expandable, allowing users to add a gas sensor for CO detection (and also ethanol, hydrogen, ammonia, and methane).

I’m now offering early versions of this project here. I’d love to hear your thoughts and suggestions!

What do you think?

Is there anything specific you’d like me to improve or add to the design?

Have any questions about the project or its components?

Thanks,
Aaron

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Just a suggestion: CO value measuring is missing. CO (carbon monoxide) is very important, although mostly overlooked - but it can kill quite easily, and it’s a potential danger in all homes with open fireplace. It’s not called “silent killer” for no reason…

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hey, thanks for your feedback, sorry if it wasn’t clear but CO is an optional extra. The sensors for this are quite expensive so I didn’t want to include it as default for those that didn’t need it.

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Ok, that’s good to hear. What type of sensor do you use?

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We use MEMS sensors specifically the MiCS-6814 though our board is compatible with any of the Sensortech MiCS range that use the same footprint.

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