DHT11 Temperature and Humidity Sensor Module

The DHT11 is a basic, low cost digital temperature and humidity sensor. (How to use DHT11)

• This is a single wire digital humidity and temperature sensor, which provides humidity and temperature values serially with one-wire protocol.
• This sensor provides relative humidity value in percentage (20 to 90% RH) and temperature values in degree Celsius (0 to 50 °C).
• This sensor uses resistive humidity measurement component, and NTC temperature measurement component.

Specification of the DHT11 sensor

• Power supply: 3.3 to 5V DC
• Current consumption: max 2.5mA
• Operating range: 20-80% RH, 0-50°C
• Humidity measurement range: 20-90% RH
• Humidity measurement accuracy: ±5% RH
• Temperature measurement range: 0-50°C
• Temperature measurement accuracy: ±2°C
• Response time: 1s
• Sampling rate: 1Hz (1 sample per second)
• Data output format: single-bus digital signal
• Data transmission distance: 20-30m (at open air)
• Dimensions: 15mm x 12mm x 5.5mm
• Weight: 2.5g
• Digital signal transmission protocol: 1 start signal + 40bit data + 1 checksum