DHT22 Temperature and Humidity sensor

The DHT22 is a digital sensor for measuring temperature and humidity with high accuracy and reliability. It is widely used in various environmental monitoring applications due to its ease of use and good performance. The sensor outputs digital data that is easy to interface with microcontrollers and development boards for real-time temperature and humidity measurements.

Key Features:

• Measures both temperature and humidity
• Digital output for easy integration
• High accuracy with low power consumption
• Wide operating temperature and humidity range
• Simple one-wire digital interface

Technical Specifications:

• Sensor Type: Digital Temperature and Humidity Sensor
• Measurement Range:
  • Temperature: -40°C to +80°C
  • Humidity: 0% to 100% RH
• Temperature Accuracy: ±0.5°C
• Humidity Accuracy: ±2% RH (typical)
• Resolution:
  • Temperature: 0.1°C
  • Humidity: 0.1% RH
• Operating Voltage: 3.3V to 6V
• Current Consumption: 0.5mA (typical during measurement), 60µA (standby)
• Communication Protocol: Single-wire digital
• Package Type: 4-pin plastic package

Applications:

• Environmental monitoring
• Weather stations
• HVAC systems
• Home automation
• Prototyping and educational projects

Usage:

1. Connect the DHT22 sensor to your microcontroller or development board using the single-wire digital interface (data, Vcc, and GND).
2. Power the sensor with a voltage within the operating range (3.3V to 6V).
3. Use an appropriate library or driver to communicate with the sensor and retrieve temperature and humidity data.
4. Process and use the data according to your application requirements.

Caution:

• Avoid exposing the sensor to extreme conditions beyond its rated range.
• Ensure proper wiring and connections to prevent incorrect readings or sensor damage.
• Follow the manufacturer’s guidelines for handling and connecting the sensor.

Datasheet:
For detailed technical specifications, refer to the DHT22 Datasheet.