alt Hacker NewsThanks for your kind words. I've added mail to profile, feel free to reach out.
If you are into air quality monitoring you might like homeassistant either with DIY sensors based on esphome (quite easy if you like very basic tinkering with low voltage) or with some off-the-shelf IOT products. If you just want to have a reliable CO2 sensor I can recommend the aranet4, but unfortunately those are quite expensive.
I had some electrical sockets which were super corroded from the humdity, so that the copper wire turned black even though the plastic wrap of the cable was still on it. The humidity must have moved up the cable for ~10cm. The mold damage that I found a year later was at the same wall, but I didn't mentally connect these two things at the time.
Thanks, I'll reach out!
Re AIQ, I've actually built a couple of devices myself (using different sensors, plantower being the most popular one, but I've played with sensiron and others as well) but I've mostly focused on the PM monitoring.
The sockets that have strange "smell" are actually on the (inside) wall that is the building boundary (i.e. not a wall with a neighbour — these sockets don't "smell"). Still, it's a bit shocking to me that this could happen. Do you know how the humidity "got" onto your wall? How were you able to find out? I'm pretty early in my mini "investigation".