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Not that I'm aware of, but it's actually pretty easy to build one from off the shelf parts (ESP8266, Plantower PMSA003, Sensirion SHT31, Sensirion SGP30, Senseair S8), which was my pet project during the pandemic. Basic soldering skills required, but otherwise nothing really complicated about it.

I can write something about it if there's any interest.

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I've had good support from airgradient

(https://www.airgradient.com/blog/2020/08/25/the-airgradient-...)

The linked DIY instructions give you a basic board with PM 2.5 particles, temp, humidity, and CO2. It is built on a Wemos D1 mini.

The founder (Achim) is very helpful.

If you wanted to use these plans to get started (including the software to power the Wemos), then buy whatever additional sensors you might like to add, it should be fairly simple.

The BOM is similar but it's not very compact. I have yet to 3D print a case for mine and get the PCB manufactured, but the dimensions for it are roughly 1"x1"x2" assembled, when not on a breadboard.

> I can write something about it if there's any interest

That would be great.

https://sigrok.org/ can log data from basic CO2 monitors, maybe it could be extended to support the sensors you mentioned.

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