Harman Control Board for Pellet Stoves and Inserts w/Touchscreen: 1-00-05372
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Replacement Control Board for all Harman pellet stoves and inserts with the Easy Touch Control System. This motherboard is located in the mechanical area of the stove and stores all of the vital functions for the stove's Touchscreen (daughterboard). Check out all of our Harman Parts! Same-day shipping!

Howdy, long time lurker!

I was wondering if anyone could give me a hand with trying to pull data from my Harmon Absolute43 pellet stove. Looking at the board, I see an RJ45 connector and thought “seems like a wireshark-like sniffer would do the job”.

However, all searches end up looking at networking rather than simple data sniffing. Any ideas as to how to add a “bridge” that also stores the data? From there, I can do the publishing side of things, just the hardware component for me has me scratching my head.

  • @Darkassassin07@lemmy.caEnglish
    2•11 months ago

    While I don’t have advice; I’ve gotta wonder what kind of data you’re expecting to get out of a stove…

    What are you up to OP?

    • brvslvrnstOP
      3•11 months ago

      Lol well, it’s got a relatively small hopper, which means it’s really easy to miss refills. I know, getting into the habit is the “right” way, but if this thing has easy access to the “low fuel” indicator, I may as well utilize if possible.

      Another thing is I’m trying to optimize the temps, and seeing a trendline is easier than it’s “estimated” usage it’s been giving me.

      Also, it has a wireless temperature gauge that I may as well tie into my system I have setup.

      And lastly, because why not 🙃

      • @Darkassassin07@lemmy.caEnglish
        2•11 months ago

        Ah, fair enough.

        Honestly it seems like the easier route, instead of trying to intercept the control boards signals, would be a thermistor/thermocouple and a direct connection to the low fuel indicator (either the input sensor, or output led. Perhaps via a photodiode like the other guy mentioned).

      • AurelianEnglish
        1•11 months ago

        Quick question the low fuel indicator is it some sort of coloured LED?

        If so you could just use a small photo sensitive resistor over it and when that lights up send data to something like home assistant.

        • brvslvrnstOP
          1•11 months ago

          Nah, the screen itself is a capacitive touch one. Technically it “flashes” when getting low, but it’s not really helpful.

          I waffled on doing something like that, but once I found the RJ45 I swooned at the possibilities lol

          • BoscoBear
            1•11 months ago

            I’ll bet it isn’t Ethernet. Do you have a scope?

            • brvslvrnstOP
              1•11 months ago

              I do not! Any suggested ones I could try to find?

              My plan is to replicate the wire layout. So first, just use a random 5e and compare the wires. Best case they were lazy and it’s just the same layout with different pin outs. Worst case I’m making a new cable with my large box of cat 6.

              Wave and holler if that plan is naïve 🙂

              • BoscoBear
                2•11 months ago

                I bet it is something simpler than Ethernet. I would open it up and look at the board. First I would look for magnetics because that would indicate Ethernet. I would look for labels on the silkscreen. I’ll bet it is something simple.