this post was submitted on 24 Dec 2024
215 points (97.8% liked)

homeassistant

12266 readers
67 users here now

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

founded 2 years ago
MODERATORS
[email protected]
215
Only Sensor (5, 4, 8-AQ, and 2-TH): The only DIY home automation sensor you'll ever need (lemmy-ui.nowsci.com:33443)
submitted 16 hours ago by [email protected] to c/[email protected]
15 comments fedilink hide all child comments
 

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/

top 15 comments
sorted by: hot top controversial new old
[–] [email protected] 4 points 2 hours ago (1 children)

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.

[–] [email protected] 1 points 24 minutes ago

I've had another user say the same thing, so I've considered investigating CO2. What's the rationale to you for wanting it?

[–] [email protected] 1 points 4 hours ago (2 children)

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?

[–] [email protected] 1 points 21 minutes ago

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.

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

No, why?

[–] [email protected] 4 points 12 hours ago (1 children)

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.

[–] [email protected] 4 points 12 hours ago

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.

[–] [email protected] 8 points 12 hours ago (1 children)

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

[–] [email protected] 4 points 12 hours ago

Yup! The ESPHome config also converts these into a standard AQI that you're used to seeing.

[–] [email protected] 5 points 13 hours ago (1 children)

Hey now! The only sensor I’ll need is actually 4?! /jk

This is awesome!

[–] [email protected] 3 points 12 hours ago

Thanks!

[–] [email protected] 5 points 15 hours ago (1 children)

This is incredible!

[–] [email protected] 2 points 12 hours ago

Thanks!

[–] [email protected] 16 points 16 hours ago (1 children)

Amazing! This is great work!

[–] [email protected] 3 points 12 hours ago

Thanks! They were fun to build and design for sure.