DHT22 Temperature Humidity Sensor

Description

The DHT22 is a digital temperature and humidity sensor with excellent long-term stability and high accuracy. Commonly used in weather stations, environmental monitoring, and smart homes, it provides calibrated digital output and works well with microcontrollers like Arduino and ESP32.

Specs

Specification	Value
Temperature Range	-40°C to +80°C
Temperature Accuracy	±0.5°C
Humidity Range	0% – 100% RH
Humidity Accuracy	±2% RH
Operating Voltage	3.3V – 6V
Output Type	Digital (single-wire)
Sampling Rate	0.5 Hz (2s interval)
Dimensions	15.1mm × 25mm × 7.7mm

Compatibility

• Arduino (with DHT library)
• ESP8266 / ESP32
• Raspberry Pi (via GPIO)
• STM32, Pico, and other MCUs with GPIO

Resources

• 📘 Adafruit DHT Sensor Library
  GitHub Link
• 💡 Arduino DHT22 Tutorial
  Beginner's Guide
• 🔧 Raspberry Pi Python Guide
  Adafruit Guide

Description
Powered by the AOSONG AM2302 chip, this digital sensor provides accurate and stable readings for both temperature and humidity. It features a single-wire serial interface for simple communication and is ideal for data logging, weather stations, and environmental monitoring. Measuring temperature from -40°C to 80°C with ±0.5°C accuracy and humidity from 0–100%RH with ±2%RH accuracy, it also includes mounting holes for easy installation. Compatible with a wide range of microcontrollers.

Specs
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Compatibility
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Resources
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