Measuring particle count, VOC gas, and CO2 air quality

[@HighFrameRate]

Interesting! I was thinking about going for the SGP30 for a decently accurate eCO2 reading, but nevermind! SCD-41 seems to be the winner! Thanks!

[@roussell]

Another good one, Bruce. I always look forward to your videos. Have you thought of running the furnace fan a bit at night (a few minutes every couple of hours) to help reduce the nighttime CO2 buildup in the bedroom? Seems like a clean air boost could help with restful sleep. Also, you have the prettiest and most-organizized Node Red flows I've ever seen. You should do a video on how to make NR (and code) not look like an absolute mess.

[@BruceWinter]

Pulsing the furnace fan is a good idea, will try that! Most of my node red code is not that well organized, but it improves slowly with time.

[@samdeir]

Great work! Thanks for putting effort to share this

[@BruceWinter]

Your welcome :)

[@kyl3dr]

Amazing video, thanks for sharing the project. I’m going to make something similar for my first raspberry pi project.

[@BruceWinter]

Thanks! Good luck with your project, let me know if I can help.

[@icarus901]

this is great - thanks for sharing. Do you have projects on github or elsewhere, by any chance?

[@BruceWinter]

I do, but it is not well organized and updated infrequently. The key piece of code for this project, the python code that runs on the pi to collect sensor data and send it to mqtt, is here: github.com/brucewinter/myhouse/blob/master/air.py

[@icarus901]

@@BruceWinter Thanks! No need for perfection..rough sketches are great for seeing what's possible.

[@siiyaonline]

Hi Bruce love this video, go to start setting this up. Question for you, want are you using for your dashboard for all your sensors?

[@BruceWinter]

Node Red and Graphana to create the widgets and plots, and then Fire10 tablets running the Fully Kiosk browser to display them.

[@alzalame]

Nice and neat , thank you for sharing

[@lawrencefloyd5411]

Thank you so much. And thanks for a well done video.

[@lawrencefloyd5411]

Hello Bruce. I trying to do something like your setup using a Pi4. Since I am fairly new to all this I'd like to know if your sensors are daisy chained together. If not would you mind telling me how you do it. Thanks.

[@BruceWinter]

Yep, thats one of great things about those STEMMA QT / Qwiic interconnects. I'm also using the Pi4, daisy chaining those sensors together. Adafruit also sells a simple 4 port Quiic hub if you want to cluster the sensors closer together.

[@ronaldvandermeer5678]

Great video. I have the sgp30 as well and I’ll be doing some testing ;-)

[@BruceWinter]

Thanks! Good luck with the testing. Baked beans might be useful :)

[@lawrencefloyd5411]

Are you using the J2 port on the board for power?

[@BruceWinter]

Power for the Pi4 is via the USBC port. The display plugs into the Pi header and all the sensors are daisy chained off the STEMMA QT / Qwiic plug on the display.

[@kyl3dr]

@@BruceWinter can I daisy chain the sensors with regular QT/quiic cables? Will I need to add any resistors or multiplexers? I will not have 2+ of the same sensor and will likely have otherwise unique addresses.

[@BruceWinter]

@@kyl3dr Yep, daisy chaining is one of the nice things about the QT / Qwiic protocol. Nothing but simple cables required.

[@JoneKone]

Amazing system you have =)

[@BruceWinter]

Thanks!

[@DAVIDLAMOURANNE]

Awesome!!