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  1. #1
    Join Date
    Sep 2005
    Rep Power

    system monotoring - what to monitor?

    had a couple of freezer problems lately and lost a lot of stock

    I've set up a tiny esp32 computer with wifi (it's about the size of a thumb) and a bunch of DS18B20 twmriture sensors - the temp sensors are cheap and the little computer board will support hundreds of them

    I've set up homeassistant running on my server (server was running anyway_ so that records all the tempritures, makes graps etc. etc. (all free and easy)

    instead of just monotoring freezer temps I'm thinking I should monitor more....

    evap air in temp
    evap temp
    evep air out temp
    liquid line into evap temp

    adding some other sensors I can check what's going on, freezer on/off (we have on/off switches at the door) defrost on/off, I'll check for power going to compressor too, to check and see if it's running when it should be / hasn't tripped out

    I'm going to add a screen in the tea room showing tempritures, so we can track what's going on (there's 6 freezers used as blast freezers - fresh/ambiant product in)

    not setup yet but I'be ordered coulour changing led bulbs, and I'll be able to make them automatically change colour to match freezer tempritures... a nice easy display in the factory for everyone to see

    I think I'll add an extra single bulb next to the factory door to glow red if any freezer is turned off - so it's easy to check on them before leaving for the night

    anything else anyone thinks I should monitor? I could add pressure monitors to liquid/suction lines... but that seams a bit overkill... all the other monotoring is non intrusive

  2. #2
    Join Date
    Dec 2007
    Rep Power

    Re: system monotoring - what to monitor?

    I would say faults, temperature alarms & dial out if temperature to high for “X” amount of time.
    Last edited by RANGER1; 17-08-2022 at 08:47 PM.

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