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?
you will need to update the firmware on the LD2450. You do this with a mobile app called HLKRadarTool
Does this seem sketchy to anyone?
It certainly did to me when I made these. I ended up using an old Android phone for that part, but many members of the ESPHome community working with these sensors use it and have never reported a problem. HLK are the original manufacturers of the LD radar chips.
No, why?
If anyone like me is wondering what:
- PM <10µm AQI
- PM <2.5µm AQI
- PM <1µm AQI
…means it’s air quality. These measurements are referring to different sizes of particulate matter (PM) and their corresponding Air Quality Index (AQI) value
Yup! The ESPHome config also converts these into a standard AQI that you’re used to seeing.
Amazing! This is great work!
Thanks! They were fun to build and design for sure.
Man, I wish this had been a thing ~8 months ago when I was building these for my stuff.
…mine are awful, and these look awesome, so maybe it’s time to re-do that.
Weellll… In usual fashion for my projects, I made these about that long ago, just tested them for a long time before doing the write-ups.
Hey now! The only sensor I’ll need is actually 4?! /jk
This is awesome!
Thanks!
This is incredible!
Thanks!
