Pets
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The temperature check you cannot make from a trailhead
A parked RV on a mild day can reach a hundred degrees inside an hour. This is the maths of that, and what monitoring does and does not solve.
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Nobody at the office can reset your thermostat
Whether the pedestal still has power decides everything: the campground can fix one of these in five minutes with a breaker, and cannot touch the other. How to know which you have before the thermometer catches up.
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Two thresholds and a clock
A rig at 82 and holding is a different animal from one that was at 74 twenty minutes ago. Nothing measures a slope, so two thresholds and the gap between them are how you read one.