DHT22 Digital Temperature and Humidity Sensor – Single Wire Interface

The DHT22 is a calibrated digital temperature and humidity sensor designed for accurate environmental monitoring. It uses a single-wire digital interface to provide reliable measurements with minimal external components. Operating over a wide voltage range, it delivers stable performance for both humidity and temperature sensing. The sensor supports a broad measurement range with good accuracy and low power consumption. It is suitable for embedded systems, data logging, and environmental control applications.

• Digital temperature and humidity sensor

• Single-wire digital communication interface

• Factory-calibrated output data

• Wide operating voltage range

• Low measuring current consumption

• Ultra-low standby current

• Full-range humidity measurement

• Wide temperature sensing range

• Stable and repeatable readings

• Operating Voltage: 3.3–6 V DC
  
• Measuring Current: 1–1.5 mA
  
• Standby Current: 40–50 µA
  
• Humidity Range: 0–100 % RH
  
• Humidity Accuracy: ±2 % RH
  
• Temperature Range: –40 to 80 °C
  
• Temperature Accuracy: ±0.5 °C
  
• Output Signal: Digital (single-wire)
  
• Calibration: Factory calibrated
• Typical Applications: Environmental monitoring, embedded systems

• DHT22 Datasheet
• DHT22 Digital Temperature and Humidity Sensor 3D Model

• Voltaat Youtube Channel
• ESP32 Tutorial - DHT11/DHT22 (Temperature and Humidity Sensor)