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A comment on Show HN: I wanted to measure CO2 in my office, so I build a C++ WebServer/App. Parent comment

Re:Show HN: I wanted to measure CO2 in my office, so I build... by gsich on Friday January 25, 2019 @10:02AM (#18998477)
And where can you buy a 8$ Co2 sensor that doesn't suck?
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