Raspberry Pi DHT11 DHT22 Temperature and Humidity Sensor

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In this video, we're going to cover how to use the DHT11 or DHT22 Temperature and Humidity Sensor with the Rapberry Pi.

Detailed article and wiring diagrams here:

Sensor Wiki:

Parts List for Project:

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[foxhallww]

I’m a network engineer too. You are a completely higher level then me. I fix things caused by user error in a daily basis.

[bulkhead]

This is the perfect addition to a homemade wood kiln.

[matthiaswandel]

Cool. I ordered some of these a few weeks back. Still waiting for them to arrive (slow boat from China)

[anniyangX]

import Adafruit_DHT
import time
 
DHT_SENSOR = Adafruit_DHT.DHT11
DHT_PIN = 4
 
while True:
    humidity, temperature = Adafruit_DHT.read(DHT_SENSOR, DHT_PIN)
    if humidity is not None and temperature is not None:
        print("Temp={0:0.1f}C Humidity={1:0.1f}%".format(temperature, humidity))
    else:
        print("Sensor failure. Check wiring.");
    time.sleep(3);

[TheGeekPub]

If you need to track the temperature of a project using a Raspberry Pi, the DHT11 and DHT22 temperature and humidity combo sensor is the perfect choice!

[watsthislifefor]

This code does not work on a Raspberry Pi4. How can we get it to work on the Pi4?

[patricklaakak]

Thank you; you just save my summer class.

[caginbektas]

Excellent tutorial, clean and basic, thank you!
I was wondering what if we do the data communication using wi-fi or bluetooth modules -to remove the cable dependency- would it make sense? Tbh, I am searching for this need and could not find a good tutor like you so far, keeping an eye on the channel :P

[lewiqe]

Don't understand it . The labels on the sensor marked: GND, Data, VCC .In the video you connect with the black cable the vcc with gnd and with red the gnd to 5V. (sensor pin to Rasp.pin)

[naoeuroi]

I always get Sensor Failure. Check Wiring, I have check the wires the led in the module is glowing. But output from the sensor cannot bt obtain. Any suggestions.

[talarikarun]

iam unable read humid and temperature values with my Pi 4, instead iam getting continuos none values ( using new DHT11 and Pi 4 )

[kinyo]

You inverted the wires VCC and GND at 1:20. The red wire should be plugged into the right pin. At the end of the video you will see the correct wiring.

[allan]

Since its all wire-connected, why is there a 65 feet distance limits?

[alesjaterka]

Hi, is there a way to connect another few DHT11 to the port? Like another 5 or more?
Thanks.

[eddiejhong]

@TheGeekPub Please add a comment in the code and an annotation to the video.
IMPORTANT NOTE FOR DHT22
If you're using a DHT22, the Python code will be slightly different. You will have to specify that the DHT_SENSOR is DHT22 rather than DHT11:
```

DHT_SENSOR = Adafruit_DHT.DHT22 # Specifies that you're using DHT22 rather than DHT11
```


Otherwise, you won't get any readings.

[robertsteel]

ok now i need the SAME VIDEO but it uses a picaxe 14M2

[dtn]

The DHT22 sensor enables temperature measurement in the range of -40 to 80°Celsius
Does your program accept this? I.e it also shows negative temperatures?

[osamaasad]

Can you make a project on how to use the CCS811/BME280 (Qwiic) Environmental Combo

[ShawarioX]

Great video, Mike! Mike, do you plan on doing more woodworking project videos?

[ivko]

Why resistors aren't in use here? thanks