What sensor are you using? Just curious.
https://news.ycombinator.com/item?id=27125060
tl;dr: seems like you want an NDIR sensor (https://en.wikipedia.org/wiki/Nondispersive_infrared_sensor).
Some options, with digikey @1 prices:
Senseair S8 (Sweden): $48
Sensirion SCD30 (Switzerland): $63
Amphenol Telaire T6713 (US): $96
If I were to buy an expensive black box iot solution, I'd at least verify that it had an NDIR sensor.
It's pretty tiny... I wonder if/when it will be possible to put a high quality co2 sensor in an IP68 iPhone...
With any IoT device I’m wary about longevity re app support, I can’t say how long Awair will support this device or whether they’ll provide access to it after they stop, but I’m less concerned for a device like this vs, say, a major appliance.
The problem with all this "intelligence" is the Internet is very good at showing you search results for what you want to see, so Googling "Should I be worried about fine particulates" is a search destined to turn your anxiety into a full-blown panic attack.
No idea what the answer is, and I am impressed with the level of effort that went into the Awair app, but it would be nice to have more reasonable context in all IoT devices. Yeah, I know.
I’ve also found that regularly glancing at the 5 minute resolution charts of just temp and humidity has helped me get a better sense of my own comfort range…for example I like to run my AC as little as possible in the summer, but I’ve learned that playing chicken with the heat is foolish beyond 81F as I only wind up sitting at my desk grumpy and unproductive.
It’s got an eink screen, and I haven’t had to recharge it since I got it 8 months ago. I really like it.