The DHT22 temperature and humidity sensor combined with the ESP8266 module is a complete solution for IoT applications. It uses the ESP8266-01/ESP-01S as the main controller, while the DHT22/AM2302 is a temperature and humidity sensor with a unique interface. Compared to the DHT11, it offers higher accuracy and a wider measurement range.

The main parameters of the module include:

• Temperature measurement:
• Resolution: 0.1°C
• Accuracy: ±0.5°C
• Detection range: -40°C — 80°C
• Humidity measurement:
• Resolution: 0.1%RH
• Accuracy: ±2%RH (25°C)
• Detection range: 0%RH ~ 99.9%RH
• Operating voltage: 3.3V ~ 12 V
• Recommended storage environment:
• Temperature: 10°C ~ 40°C
• Humidity: below 60%RH

The module can be used as a temperature and humidity collection node for smart homes or IoT projects, and supports 3.7V-12V DC power supply (3.7V lithium).

Suitable applications include weather stations, humidity controllers, and testing and control equipment.