The DHT22, also known as the AM2302, is a popular digital temperature and humidity sensor module used for measuring both temperature and relative humidity in various applications. This sensor is known for its accuracy and ease of use, making it a common choice for environmental monitoring, weather stations, HVAC systems, and IoT projects. The DHT22 sensor is known for its reliability and accuracy in measuring temperature and humidity, making it suitable for a wide range of applications where environmental monitoring is essential. When using the DHT22 sensor in your projects, it’s important to follow the manufacturer’s datasheet and documentation for proper wiring, calibration, and usage instructions to ensure accurate measurements. Additionally, libraries and code examples are readily available for popular microcontroller platforms like Arduino, making it easy to integrate into your projects.

Specifications:

• Sensor Type: Combines temperature and humidity sensing capabilities.
• Measurement Range:
  • Temperature: Typically ranges from -40°C to 80°C (-40°F to 176°F).
  • Humidity: Typically measures relative humidity from 0% to 100% RH.
• Accuracy:
  • Temperature Accuracy: Typically ±0.5°C (±0.9°F).
  • Humidity Accuracy: Typically ±2% RH.
• Output: Digital output (single-wire digital interface), which can be read by microcontrollers like Arduino.
• Operating Voltage: Usually operates at 3.3V or 5V DC, depending on the model.
• Response Time: Generally provides quick response to changes in temperature and humidity.
• Calibration: Typically pre-calibrated and factory-tested for accurate measurements.
• Interface: Communicates using a proprietary single-wire protocol.
• Application: Widely used in weather stations, environmental monitoring, home automation, and more.
• Mounting: Compact and easy to mount on a PCB or within a protective enclosure.
• Compatibility: Compatible with various microcontrollers and single-board computers, including Arduino, Raspberry Pi, and more.