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Multiple DHT humidity sensors on Arduino

A reader of my book Arduino Projects To Save The World recently asked me about the DHT11 and DHT22 sensors. In particular, how to connect multiple sensors (and how to write the code for it) to an Arduino. I must admit I had never considered it. I have used them plenty of times, but not in parallel. Turns out, Adafruit's DHT library makes it super easy.

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