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FOSDEM 2025

I'm going to in Feb. If you know if any of the teams who organise devrooms or similar spaces would be open to having CO2 sensors running in the rooms, and making the values visible to participants, I'd love to know.

It feels like an affordable project to do, and quite scalable too.

Actually… I'm doing a talk in the dev room anyway. I'm happy to start with bringing a sensor of my own if there's nothing better available.

fosdem.org/2025/schedule/track

Anyone else up for it?

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I posted about air quality / indoor CO2 in rooms yesterday in , and this project here appears to set up a fairly accurate in-room CO2 sensor (a SCD4x one) with a tiny ESP32 minicomputer.

The box can join wifi, and then expose the live CO2 values for scraping via Prometheus/Grafana, a well known monitoring/observability stack.

It even includes a 3D model for 3D printing the box, and sample code and links to buy the kit, for 30-40 EUR total.

Not bad!
tech.lgbt/@alxndr/112051071094

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Also, TIL I learned that there is s to FOSDEM started by a bunch of ppl in Slovenia!

Here's the forum post explaining it.

forum.na-prostem.si/t/hackertr

Also they've sorted out a 10% discount on the European Sleeper to get to Brussels. I *just* came back from Brussels to Berlin on the ES, and I'll almost definitely take it there now.

@alexglow do you remember the ? It's becoming a thing!

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If you’re at , and

1. you’re feeling a bit 😅 about how crammed some of the rooms are
2. you‘d prefer to avoid either getting or transmitting some nasty lurgy

Then this post might be useful to you.

I spent a bunch of time yesterday hunting around in shops near the campus to buy one. Learn from my folly - this would have been much more convenient:
chaos.social/@RichiH/113930416

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Aw yiss! Got my proposal accepted:

“""
How do we work out the environmental savings from accessibility?

In this talk, we'll take a look how we can quantify the environmental savings from supporting a wider range of devices with the digital services we design and operate.
“””

I guess I better write it now 😅.

If you'd be curious about this and you have qns you'd like me to cover in the talk leave a comment.

(I can't promise to answer it before )

pretalx.fosdem.org/fosdem-2025

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Oh sweet, my talk recording, “How do we work out the environmental savings from accessibility?" is online now!

Here's the direct link to the talk - it's 20mins long, with 5 mins of questions:

ftp.fau.de/fosdem/2025/k3201/f

I'll add the other links to the deck, the FOSDEM page and the rest in the other posts in the thread.

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Oh neat! If you follow - we now have 7 devrooms interested in doing indoor CO2 monitor thing! WOOT!

Here's the pad we're using to coordinate. If you are organising a devroom, or planning go to one at fosdem and would like to see some info about indoor CO2 (i.e. a rough proxy for air quality used for public health), then you can add yourself to the list below:

pad.public.cat/D0sRexLgTlmdcxl

Link to my original post below:
mastodon.social/@mrchrisadams/

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And this here is the list of all the talks related to sustainability I've done at FOSEM over the the last few years

thegreenwebfoundation.org/even

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