I brought my CO2 sensor prototype to #FOSDEM!
In K.3.401 (a tightly-packed dev room with closed windows), I measured a CO2 concentration of over 3000 ppm.
For reference: Outside air is currently ~420 ppm, and a common suggestion is to ventilate rooms to <= 1000 ppm.
=> More informations about this toot | More toots from blinry@chaos.social
@blinry Does it run with purely free software? :-)
=> More informations about this toot | More toots from bortzmeyer@mastodon.gougere.fr
@bortzmeyer Yup, based on esp-rs, and running on a RISC-V microcontroller :) The sensor component itself (from Senseair) might have a proprietary firmware, though.
=> More informations about this toot | More toots from blinry@chaos.social
@blinry @bortzmeyer can you post a link or link to code?
=> More informations about this toot | More toots from raspberryswirl@chaos.social
@raspberryswirl @bortzmeyer You can find some development history in this thread: https://chaos.social/@blinry/111686968730819403
And I just pushed the firmware here for you (more docs coming up in the future): https://github.com/blinry/co2-sensor-firmware
At some point, I'd like to design a custom PCB, untested schematic here: https://www.reddit.com/r/PrintedCircuitBoard/comments/1gwpryl/schematic_review_request_esp32c6_lowpower_co2/
=> More informations about this toot | More toots from blinry@chaos.social
@blinry @bortzmeyer ESP32-C3?
=> More informations about this toot | More toots from federico3@oldbytes.space
@federico3 C6! @bortzmeyer
=> More informations about this toot | More toots from blinry@chaos.social
@blinry people have been posting pics of ARANET 4's displaying around 2800 ppm, so it sounds consistent with your measurement.
=> More informations about this toot | More toots from bremner@mathstodon.xyz
I tend to brag about my history knowledge by telling @blinry things like "Oooh, we reached Signing of Magna Carta levels of CO₂, we should open the windows.", but not even my Star Trek knowledge (which is, surprisingly, smaller than my history knowledge) helps me with those levels.
=> More informations about this toot | More toots from piko@chaos.social
@piko @blinry Well, you're past the Burn already. The United Federation of Planets is scattered. But don't worry, if all of you exhale just a little bit more, Theta Zeta will be discovered.
Let me know if you're still conscious when you're at Calypso-era levels.
=> More informations about this toot | More toots from scy@chaos.social
@piko @blinry "the air was so dense with carbon it sparkled like diamonds" 😂
=> More informations about this toot | More toots from viq@hackerspace.pl
@blinry wow, that is super neat! I've been thinking about building such a device for a while, glad to see so much progress!
=> More informations about this toot | More toots from olasd@mastodon.opportunis.me
@blinry not healthy indeed.
=> More informations about this toot | More toots from melroy@mastodon.melroy.org
@blinry @joepie91 nice! And interesting, I've attached an MH-Z19 (because there was ready software for it) to a flipper (because I already had it), and that one apparently doesn't go higher than 2000 ppm 😅
=> More informations about this toot | More toots from viq@hackerspace.pl
@blinry Wow, peope must certainly feel dizzy at that CO2 comcentration inside a room. Certainly hard to think clearly. I also wish more organizers were aware of the correlation between mental focus and a reasonably low CO2 level (<800ppm is good I think, <600ppm feels fresh to me). Not to mention virus loads and suppression of immune system in such saturated used up air.
=> More informations about this toot | More toots from FMarquardtGroup@fediscience.org
@blinry @datenwolf on the plus side: if it get's worse, you don't have to switch font size or display to fit the number onto that screen
just switch from ppm to %
=> More informations about this toot | More toots from drazraeltod@chaos.social
@blinry
Hey, I've built something similar with SCD41 MQ135 and SDS011 but without a custom fw (Tasmota seems enough for me). Would be nice to have FOSDEM AQI metrics!
=> More informations about this toot | More toots from federico3@oldbytes.space
@blinry what do you think about attaching a portable HEPA filter with a large battery to it? Have it auto turn on when the CO2 concentration goes above n. It of course wouldn’t turn off till it got some fresh air but it would be an audible indicator of the need for fresh air.
It would be like the size of those large water bottles people carry around and they would have to charge every night just like their phones. People like canister shaped objects, charging, & carrying things
=> More informations about this toot | More toots from abemassry@jawns.club
@abemassry That sounds like the #airbib project @flauschzelle is working on! :) (A wearable version of what you're describing!)
=> More informations about this toot | More toots from blinry@chaos.social
@blinry
@abemassry
With the bottle-like shape, it sounds more like e.g. the ToGoFilter.
But both that one and my AirBib (of which I should update the docs to reflect the current status -.-) have in common that they use a VOC sensor instead of CO2, because VOC can actually be reduced by filtering, unlike CO2 (and also VOC sensors are cheaper).
=> More informations about this toot | More toots from flauschzelle@chaos.social
@flauschzelle @blinry I was thinking CO2 is a proximal indicator of pathogenic air and not a direct indicator, which the HEPA filter might help with.
I haven’t put in any actual work into developing it, so massive props to you. (Outside of researching for a product like this in the marketplace and finding none existed)
=> More informations about this toot | More toots from abemassry@jawns.club
@abemassry
@blinry
CO2 can be very useful as a proximal indicator of pathogenic air...if there are no filters running. Otherwise it can make the air appear more pathogenic than it actually is.
But a high CO2 level is of course even then still useful as a sign that the windows should be opened, because even without the pathogens, high CO2 will still make people tired and give them headaches :/
=> More informations about this toot | More toots from flauschzelle@chaos.social This content has been proxied by September (3851b).Proxy Information
text/gemini
