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Enclosure/Room environmental monitors (lemmy.ml)
submitted 5 months ago by to c/selfhosting@slrpnk.net
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any suggestions on enclosure or room temp/humidity sensors? PoE network connected would be ideal, but USB works as well (cheap, simple). polling/transformation of data will ultimately be done by a raspi 3b.

open software/hardware is highly desirable and, as long as data is structured, I can transform as needed for insertion into a zabbix backend.

thanks for any recommendations :-)

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[–] 1 point 5 months ago (3 children)

This task needs more specifications; humidity is such a wide spectrum.

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  • [–] [S] 2 points 5 months ago* (last edited 5 months ago) (2 children)

    So poking around, here is what I have been thinking about.

    Multi-sensor - cabled

    • Adafruit Feather RP2040 Adalogger (RP2040, STEMMA QT, microSD, LiPo connector, USB-C)
    • Adafruit PCA9546 4-Channel STEMMA QT I2C Multiplexer (4 downstream STEMMA QT ports)
    • Adafruit SHT40 Temp/Humidity Breakout (STEMMA QT, ±0.2°C / ±1.8% RH)

    Single sensor - direct attached

    • Adafruit SHT45 Trinkey (USB Temp and Humidity Sensor with PTFE)

    or

    • Adafruit SHT41 Trinkey (USB Temperature and Humidity Sensor)

    available libraries should make coding this up fairly straightforward. I have not worked with adafruit h/w before, but definitely interested I doing so.

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  • [–] 2 points 5 months ago (1 child)

    ah it's this way.

    ok, just consider buying bare sensors and attaching them to some MCU boards you like - with good connectivity and all - some distance away from the boards (working MCU alters readings significantly unless you bump it into ultra low power, which makers of these simple adafruuit probes often do not care about). It's way cheaper and easier to integrate in most cases, also you get to choose sensors just for the task, often you can get insane performance (like, glass-clad Pt thermal probes are often surprisingly cheap, for example)

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