homeassistant

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Home Assistant is open source home automation that puts local control and privacy first. Powered by a worldwide community of tinkerers and DIY enthusiasts. Perfect to run on a Raspberry Pi or a local server. Available for free at home-assistant.io

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Looking for a cheap dopamine hit ;) (lemmy.world)

submitted 3 months ago by [email protected] to c/[email protected]

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I love playing with my HA and associated devices. I suspect that most of you reading this get a bit of a jolt every time you add and incorporate a new sensor, camera, integration and get to play with it.

I have all the door/window sensors and locks/covers, every angle of my exterior covered with cameras, alarm, network devices, appliances, sprinklers, household devices covered.

Any ideas for a new thing I can play with?

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[–] [email protected] 1 points 3 months ago (2 children)

Do you have a suggestion for a good air quality sensor (especially for CO2 and VOCs) that outputs reliable results, works over ZigBee and is preferably battery powered? I had a CO2 sensor once but that needed to be calibrated outside really frequently so I stopped using it.

[–] [email protected] 1 points 3 months ago (1 children)

The CO2 sensor calibration thing is inherent in the technology. They drift, a lot, and without occasional reference to a known standard, there's no way to know whether "1000" is really 1000, or 500, or 2000, but exactly how that gets implemented seems to vary a lot. I have an SCD30 board from Adafruit, which internally records CO2 minima and, over the course of week or so, adjusts its calibration so that minimum is 420. That means no special calibration procedure, but it does have to be somewhere that it gets periodic fresh air exposure.

There's a newer, photoacoustic sensor technology that doesn't seem to require continuous recalibration, but (at least this one: https://www.sparkfun.com/products/22956 ) require an extensive initial calibration.

[–] [email protected] 1 points 3 months ago

Sorry for the late reply. That photacoustic one looks interesting. I have no issue with an extensive initial calibration when it then just works without me needing to take care of it regularly. Thank you :)

[–] [email protected] 1 points 3 months ago (1 children)

If you want a whole kit then the AirGradient ones look pretty nice

[–] [email protected] 2 points 3 months ago

Thanks for the recommendation. That is pretty pricey but if it works, that's fine. Though probably not feasible to have in every room then :D

But I assume it also needs periodic recalibration for the CO2 sensor, right?