DHT11 Temperature and Humidity Sensor

Description

The DHT11 is a temperature (from 0°C to +50°C) and relative humidity (from 20% to 90%) sensor. It features a single-wire serial interface that makes it easy to use. The DHT11 sensor is extremely accurately calibrated; the calibration coefficients are stored in OTP memory and are recalled during the sensing process, so there is no need to recalibrate the sensor. It is particularly suitable for consumer products, weather stations, HVAC (Heating, Ventilation and Air Conditioning) applications, etc.

Technical Specifications

• Humidity:
  – Accuracy: ±5%RH (0~50°C)
  – Measurement range: 20%RH ~ 90%RH (25°C)
• – 1 VCC
  – 2 DATA
  – 3 Not used
  – 4 GND

Documentation and useful links

• Schematics and code
• Library