DHT 11 Sensor Voltages

Question

GOAL

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

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.

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
@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

tlfong01 · Accepted Answer · 2020-02-12 04:59:36Z

1

Answer

DHT11 Wiring Suggestion

References

Appendices

edited Feb 12, 2020 at 4:59

answered Feb 12, 2020 at 4:39

tlfong01

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