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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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 3 days ago by fmstrat@lemmy.nowsci.com to c/homeassistant@lemmy.world

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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/

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[–] teawrecks@sopuli.xyz 6 points 3 days 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?

[–] fmstrat@lemmy.nowsci.com 6 points 2 days 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.

[–] viking@infosec.pub 4 points 3 days ago (1 children)

No, why?

[–] teawrecks@sopuli.xyz 6 points 2 days ago

Because DFU exists. We shouldn't need an idle Bluetooth radio and proprietary arbitrary code execution to update the firmware on a device.

There are so many unnecessary attack vectors involved in this process, it should raise some red flags.