A 3-Wire DHT 11 of unknown pedigree is to be connected to a Raspberry Pi:

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The goal is to take "due diligence" and avoid frying an rPi. Thank you


Ada Fruit's 4-pin DHT11 indicates 3-5 Power.

The "kookeye" tutorial shows 3.3V power & 3 direct wires between DHT11 and rPi.

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  1. If powered by 5V, will the DHT11 communicate at proper (3.3V?) voltage level?
  2. If powered by 3.3V will the DHT11 communicate at the proper 3.3V voltage level?
  • 2
    Why take the risk? Why not just power it from 3V3?
    – joan
    Commented Feb 11, 2020 at 22:35
  • I DEFINITELY wouldn't! These modules have a pullup from Vcc to the data pin.
    – Milliways
    Commented Feb 11, 2020 at 22:51
  • My answer to the following DHT11 question might help: raspberrypi.stackexchange.com/questions/97949/….
    – tlfong01
    Commented Feb 12, 2020 at 2:19
  • Yet another of my couple of answers on DHT11, this time explaining the "latch up" thing which might have fired your Pi: raspberrypi.stackexchange.com/questions/96560/…. Good luck. Cheeers..
    – tlfong01
    Commented Feb 12, 2020 at 2:23
  • 1
    @tlfong01: Good postings! I have not wired the sensor: my rPi should be in good shape. I added a new questions based on tlfong01's comments. I am now wondering if powered by 3.3.V the DHT11 will safely communicate at 3.3V with the data line?
    – gatorback
    Commented Feb 12, 2020 at 3:34

1 Answer 1



DHT11 Wiring Suggestion

dht11 wiring


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