this post was submitted on 18 Feb 2024
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ESP32
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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 π
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).
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.
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
I'll bet it isn't Ethernet. Do you have a scope?
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 naΓ―ve π
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.