Hey all,
A couple of weeks ago I posted my 3D printable pegboard organizers, and today I’m releasing the Only Sensor line of home automation sensors.
Fully free and open, complete with wiring diagrams, cases, component bill of materials, and instructions for assembly.
You source and build them yourself, with acquisition costs ranging from $2-$35 to build, and options for:
- mmWave presence
- PIR motion detection
- Temperature
- Humidity
- LUX
- PM <10µm AQI
- PM <2.5µm AQI
- PM <1µm AQI
- NOX
- VOC
All integrate with Home Assistant via ESPHome.
All the details can be found at: https://nowsci.com/only-sensor/
Very nice.
It’s missing CO2, but those are expensive so that’s understandable. If you need one of those, I think https://www.airgradient.com/ is a great choice.
I’ve had another user say the same thing, so I’ve considered investigating CO2. What’s the rationale to you for wanting it?
Not speaking for Mr Lemon, but for me CO2 levels are an interesting metric to trigger my air exchanger / HVAC fan combo for in a given zone, since it indicates stale air in general.
Good to know, maybe I’ll add a MH-Z19.
Same ^
CO2 sensor for me is the most important.
I don’t have HVAC, so I’m just using it to see when the air at my desk is getting stale so I remember to open the window. I mostly use homeassistant for the configuration, although I might also set up a notification at some point (I only got my sensor 2 days ago)
Interesting. The AirGradient sensors are exactly what I’m trying to avoid with the OS, considering their price tag. MH-Z19 sensors might be a good direction for me to go.