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[–] 9 points 14 hours ago (2 children)

Read only remote access is useful for life critical supplies. You want to know, as soon as possible if your blood has gone out of safe storage temperatures, and for how long. It would let you save the supplies by moving them to a new freezer.

The problem is remote temperature control. That bit should be air gapped, unless you have a very good reason to need to adjust it remotely.

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  • [–] 4 points 12 hours ago (1 child)

    I'm not against remote monitoring. But remote controls are just fucking stupid in a freezer. Pretty much any temperature change needs someone on site anyway in order to move the freezer's contents someplace else beforehand. Keeping temperature constant can be accomplished via a simple thermostat. If you really need some sort of cycle that changes temperature over time, the controller doing that can be purely off line as well. Anything that allows remote control endangersvthe contents of your freezer.

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  • [–] 1 point 12 hours ago

    I mostly agree. I can think of a few niche uses for it. However, they are very uncommon. E.g. bringing a freezer of blood up from "deep storage" temperatures to "ready to use in a hurry".

    I can also think of a few more where a "boost mode" could be useful e.g. a supermarket that knows there is a heat wave. Over-chilling the freezers would let them cope better with the temperature spike later in the day.

    Critically, these should still be within safe hard limits. The fact that hackers could effectively switch them off in mass is the huge issue.

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