tggzzz wrote: ↑Sat Mar 14, 2026 2:05 pm
"Making" and SBCs such as Raspberry Pi cater to the same sheddy, tinkering instinct the amateur electronics rags covered. It's a constructive interest and no bad thing.
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I know someone who came home to a freezer full of rotting food, because while she was on holiday, poorly thought out and codged wiring in an outbuilding, had thrown the main trip in the house, which really shouldn't have happened. Possibly receiving a message would have enabled her to do something about it, but I doubt she would have come back from Italy or wherever, to deal with it.
I could have done with a freezer alarm a few months ago, but IoT devices usually require power and a working internet connection. Spot the catch 22.
It depends on the fault you are guarding against and whether you have a UPS capable of keeping the internet connection going for a few minutes, and whether the monitor in the fridge had a battery or super capacitor to keep it going for a short time. If the fridge broke because the thermostat or motor had failed, the monitor would still have power.
You also have to estimate how likely it is to happen, and balance the cost of a failure against the cost of providing against it.
In her case the ELCB in the outbuilding was present but not wired in, neither was there an ELCB in the house for the outbuilding, most of which was an ancient barn with an apartment on the end. The wiring in the outbuilding was amateurish, and in some places hair-raisingly dangerous. There was a short, I'd guess caused by water, and the main trip in the house was thrown, disconnecting everything. Had she been made aware of this and left a key with friend, they could have been contacted and asked to reset the trip, but it's by no means certain that would have helped. The main trip could well have been thrown again immediately. The fault may have been caused by rain being blown in and getting to the wrong place.The outbuilding could have been disconnected, but you'd need to have some electrical knowledge and investigate sufficiently to isolate the problem.