Description

DHT11 Digital Temperature and Humidity 1-wire Sensor

Universal digital air temperature and humidity sensor with 1-wire digital interface.

The circuit can be operated using a microcontroller or any runtime kit such as Arduino.

Technical data

• Power supply: 3 – 5.5V
• Average current consumption: 0.2 mA
• Temperature Measurements
• Measuring range: 0 – 50 °C
• Resolution: 8-bit (1 °C)
• Accuracy: 1 °C
• Response time: 6 – 15 s (typically 10 s)
• Moisture Measurement:
• Measuring range: 20 – 90 %RH
• Resolution: 8-bit (±1 % RH*)
• Accuracy ±4 RH* (at 25 °C)
• Measuring range: 6 – 30 s
• Output: single bus

• Outputs:

• Dimensions:

Example of connection with a microcontroller

The diagram shows the simplest way to connect the circuit to any microcontroller using a single-wire interface.

VDD – supply voltage, DATA – data line with 5 k Ohm pull-up resistor, GND – circuit ground.