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/

  • teawrecks@sopuli.xyzEnglish
    5·
    17 hours ago

    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.comOPEnglish
      6·
      14 hours 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.

      • teawrecks@sopuli.xyzEnglish
        2·
        7 hours 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.