DHT22 Temperature and Humidity Sensor

The DHT22 Sensor Module (also known as AM2302) is a high-precision digital temperature and humidity sensor ideal for accurate environmental monitoring. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, providing precise and stable digital output signals via a single data pin.

Compared to the DHT11, the DHT22 offers wider range, higher resolution, and better accuracy, making it suitable for professional and industrial-level applications. It operates with 3.3V to 6V, and is compatible with Arduino, ESP32, Raspberry Pi, and other microcontroller platforms.

Perfect for weather stations, greenhouse monitoring, HVAC systems, and IoT-based automation, the DHT22 is a reliable sensor for any project requiring environmental feedback.

Key Features:

• ✅ High Accuracy Measurement
  ±0.5°C temperature accuracy and ±2–5% humidity accuracy for reliable monitoring.

• ✅ Wide Sensing Range
  Temperature: -40°C to +80°C, Humidity: 0% to 100% RH.

• ✅ Digital Signal Output (Single-Wire Protocol)
  Easy interface with microcontrollers using popular DHT libraries.

• ✅ Low Power Consumption
  Operates efficiently with minimal current draw—ideal for battery-powered IoT systems.

• ✅ Long-Term Stability
  Excellent for continuous environmental monitoring over extended periods.

• ✅ Pre-Calibrated Sensor Module
  Plug-and-play design with onboard resistor and standard 3-pin interface (VCC, GND, DATA).

Specifications:

• Temperature Range: -40°C to +80°C

• Humidity Range: 0% to 100% RH

• Temperature Accuracy: ±0.5°C

• Humidity Accuracy: ±2%–5% RH

• Operating Voltage: 3.3V – 6V DC

• Output: Digital signal (single-wire serial)

• Sampling Rate: 0.5 Hz (1 reading every 2 seconds)

• Dimensions: Approx. 3.2 cm x 1.5 cm

• Interface: 3-pin (VCC, GND, DATA)