Basic Humidity Temperature Sensor DHT11



The DHT11 is a basic, 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). It’s 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.


  • 3 to 5 V power and I/O
  • 2.5 mA max current use during conversion (while requesting data)
  • Good for 20-80% humidity readings
  • Good for 0-50°C temperature readings
  • No more than 1 Hz sampling rate (once every second)
  • Dimension: 15.5 × 12 × 5.5 mm
  • 4 pins with 0.1″ spacing
  • Additional information
  • Gross weight: 14 g
  • Manufacturer part number: DHT11


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