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Good. You've got a read-only widget that monitors your freezer.

If it were hacked to start delivering temperature readings that were dangerously-high while you were out of town, then: Would you keep the food, or discard it?

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1) you'd wonder what broke 2) you'd wonder why it fixed itself 3) you'd check the ice cream when you got home 4) ice cream is fine, must have been a bug in the temperature reporting.

I also keep a marble on a shot glass of ice ;) but I am not good at religiously checking it every time I open the freezer. It's a sanity check for the sensor.

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