Product details
The DHT22 (AM2302) Temperature and Humidity Sensor Module is a high-precision digital sensor designed to measure ambient temperature and relative humidity with excellent accuracy and long-term stability. It features a calibrated capacitive humidity sensing element and a thermistor, combined with an internal microcontroller that outputs a digital signal through a single-wire interface. Compared to the DHT11, the DHT22 offers a much wider measurement range, higher accuracy, and finer resolution, making it ideal for weather stations, home automation, IoT projects, HVAC systems, environmental monitoring, agricultural applications, and industrial control systems. It is fully compatible with popular development boards such as Arduino, ESP32, ESP8266, Raspberry Pi, and STM32.
Specifications
- Sensor Type: Digital Temperature & Humidity Sensor (DHT22 / AM2302)
- Operating Voltage: 3.3V – 5.5V DC
- Operating Current: ~1.0–1.5mA (measuring), <60µA (standby)
- Temperature Measurement Range: -40°C to +80°C
- Temperature Accuracy: ±0.5°C
- Temperature Resolution: 0.1°C
- Humidity Measurement Range: 0–100% RH
- Humidity Accuracy: ±2% RH (Typical)
- Humidity Resolution: 0.1% RH
- Communication Interface: Single-Wire Digital Output
- Sampling Rate: One reading every 2 seconds (0.5Hz)
- Factory Calibrated: Yes
- Long-Term Stability: Excellent
- Module Pins: VCC, DATA (OUT), GND
- Operating Temperature: -40°C to +80°C
- Compatible Boards: Arduino, ESP32, ESP8266, Raspberry Pi, STM32, AVR, PIC and other microcontrollers
- Applications: Weather stations, Smart Home Automation, IoT Devices, Greenhouses, HVAC Systems, Environmental Monitoring, Agricultural Projects, Data Logging Systems, Industrial Automation.
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