DHT22 Digital Temperature Humidity Sensor

DHT22 Digital Temperature and Humidity Sensor – High Accuracy Sensor for IoT and Environmental Monitoring

The DHT22, also known as AM2302, is a highly accurate digital sensor for measuring both temperature and humidity. It offers better precision and a wider range than the DHT11, making it ideal for weather stations, smart agriculture, HVAC systems, and IoT-based environmental monitoring.

The sensor outputs digital data via a single-wire interface, making it easy to use with Arduino, ESP32, ESP8266, Raspberry Pi, and other microcontrollers. It’s a popular choice for academic, hobbyist, and industrial projects across Bangladesh.

Key Features:

• Temperature Range: –40°C to +80°C (±0.5°C accuracy)

• Humidity Range: 0%–100% RH (±2–5% accuracy)

• Operating Voltage: 3.3V to 6V

• Digital signal output (single-wire)

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

• Long-term stability and low power consumption

• Fully calibrated and ready to use

Applications:

• IoT-based temperature and humidity monitoring

• Smart home and industrial automation

• Greenhouse and agricultural control systems

• Weather monitoring stations

• EEE/CSE final year academic projects in Bangladesh

The DHT22 sensor is ideal for developers who need higher accuracy and wider sensing range in their environmental monitoring systems.