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The DHT11 is a basic, ultra low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and spits out a digital signal on the data pin (no analog input pins needed). Its fairly simple to use, but requires careful timing to grab data. The only real downside of this sensor is you can only get new data from it once every 2 seconds, so when using our library, sensor readings can be up to 2 seconds old.

Simply connect the first pin on the left to 3-5V power, the second pin to your data input pin and the right most pin to ground. Although it uses a single-wire to send data it is not Dallas One Wire compatible! If you want multiple sensors, each one must have its own data pin!

Downloads:

We have the DHT11 datasheet but its in chinese so its not easy to understand. However, the sensor protocol and timing is similar to the DHT22 so check out the DHT22 datasheet for more information

Arduino library and example code

Detailed usage tutorial

Learn

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DHT11 Basic Temperature-Humidity Sensor + Extras [386]

  • Brand: Adafruit
  • Product Code: ADA-386
  • Reward Points: 5
  • Availability: Out Of Stock
  • £7.98

  • Ex Tax: £6.65
  • Price in reward points: 100

DHT11 Temperature and Humidity Sensor

DHT11 Temperature and Humidity Sensor

£6.20

DHT11 Temperature and Humidity Sensor features a calibrated digital signal output with the ...

Out Of Stock

DHT22 Temperature and Humidity Sensor

DHT22 Temperature and Humidity Sensor

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DHT22 is a compound digital temperature and humidity sensor which outputs calibrated digital ...

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DHT22 Temperature-Humidity Sensor [385]

DHT22 Temperature-Humidity Sensor [385]

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The DHT22 is a basic, low-cost digital temperature and humidity sensor.

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DHT11 Temperature-Humidity Sensor

DHT11 Temperature-Humidity Sensor

£5.21

This is a calibrated digital temperature and humidity module with onboard sensor DHT11.

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DHT22 Temperature-Humidity Sensor (AM2302)

DHT22 Temperature-Humidity Sensor (AM2302)

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It can be used for detecting ambient temperature and humidity, through the standard single-wire ...

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