At a few of our sites, we have webcam-pointing-at-gauge. Deemed secure via air g... | Hacker News

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snypher 37 days ago | parent | context | favorite | on: Water system controllers don't belong on the inter...

At a few of our sites, we have webcam-pointing-at-gauge. Deemed secure via air gap and simple to deploy.

27183 37 days ago [–]

That's great! Different take on the opto-isolator.

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