Connectivity
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Your hub went offline. Was it the power or the internet?
A hub cannot report its own death, so both failures arrive as the same silence. Four ways to tell them apart after the fact, and the wiring that stops the question being ambiguous in the first place.
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The part nobody sells you
A sensor tells the hub. The hub has to tell you, and that second part is the one that quietly does not work. How to get a connection to your RV, including the storage case where it is hardest and matters most.