The DHT22 (also known as AM2302) is a digital-output sensor module capable of measuring ambient temperature and relative humidity. It features a capacitive humidity sensor and a thermistor, providing accurate readings with digital signal output, eliminating the need for analog-to-digital conversion.

Compared to its sibling, the DHT11, the DHT22 offers greater accuracy, a wider range, and faster response time. It communicates over a single-wire digital interface, making it easy to use with Arduino, ESP32, Raspberry Pi, and other microcontrollers.

Key Features:

✅ Temperature Range: -40°C to +80°C (±0.5°C accuracy)
✅ Humidity Range: 0% to 100% RH (±2–5% accuracy)
✅ Digital signal output (1-wire interface)
✅ Operating Voltage: 3.3V to 6V
✅ Sampling rate: 0.5 Hz (2 seconds per reading)
✅ Low power consumption
✅ Long-term stability
✅ Fully calibrated and ready to use

Applications:

🌡️ Smart thermostats and HVAC control
🏠 Home automation and environmental monitoring
🌱 Greenhouses and agriculture
📈 Data logging projects
🔬 Weather stations
📡 IoT and wireless sensor networks

What’s Included:

✔️ 1 x DHT22 Temperature & Humidity Sensor Module
(May include onboard pull-up resistor and header pins)