The posts last week about the factory worker monitoring startup? There were at least 3 posts (and I think dang let the dupes through, since some mentioned YC, and HN moderates less in such cases):

https://news.ycombinator.com/item?id=43175023

https://news.ycombinator.com/item?id=43170850

https://news.ycombinator.com/item?id=43180133