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  • That seems to be a bit of a silly way of combining bytes to form a 16 bit value if you ask me... Commented Oct 30, 2021 at 17:18
  • I've got the exactly same code in another library. I'll try to put my DHT22 into the freezer tomorrow and see what happens. Commented Oct 30, 2021 at 21:12
  • @Majenko, at least this thing manages to work while the temperature is positive. I now wait until the temperature outside drops below zero, since my DHT22 is installed outside without a possibility to move it. Maybe, changing temperature *= -1; to temperature *= -1.0f; will help? Commented Oct 31, 2021 at 4:55
  • That's unlikely to help, because temperature is already a float at that point. Commented Oct 31, 2021 at 7:54