DHT22 Temperature and Humidity Sensor Module

DHT22 Temperature and Humidity Sensor Module

The DHT22 Temperature and Humidity Sensor Module is a high-precision digital sensor designed to measure ambient temperature and relative humidity. As an upgraded version of the DHT11, the DHT22 offers a wider measurement range, higher accuracy, and improved reliability, making it ideal for environmental monitoring, weather stations, home automation, and IoT projects.

The sensor combines a capacitive humidity sensing element with a thermistor-based temperature sensor and communicates with microcontrollers through a single digital data pin. The module includes an onboard pull-up resistor and filtering capacitor, allowing direct connection to Arduino, ESP32, Raspberry Pi, and other development boards without additional components.

Key Features

• High-accuracy temperature and humidity measurement
• Wide operating temperature range from -40°C to 80°C
• Humidity measurement range from 0% to 100% RH
• Single-wire digital communication interface
• Low power consumption
• Built-in pull-up resistor and filter capacitor
• Easy integration with Arduino, ESP32, Raspberry Pi, and other microcontrollers
• Ideal for IoT, weather monitoring, automation, and environmental sensing projects

Technical Specifications

• Operating Voltage: 3.5V – 5.5V DC
• Communication Interface: Digital I/O
• Sampling Rate: One reading every 2 seconds
• Measuring Current: 0.3mA
• Temperature Measurement Range: -40°C to 80°C
• Temperature Accuracy: ±0.5°C
• Humidity Measurement Range: 0% to 100% RH
• Humidity Accuracy: ±1% RH
• Low Power Consumption
• Dimensions: 5 × 4 × 2 cm

Applications

• Weather stations
• Smart home automation
• Greenhouse monitoring
• HVAC systems
• Environmental data logging
• IoT and embedded projects

Package Includes

• 1 × DHT22 Temperature and Humidity Sensor Module
• 1 × Connecting Cable