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
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