DHT22 / AM2302 High-Precision Digital Temperature and Humidity Sensor Module – Compatible with Arduino, ESP32, & Raspberry Pi
Short Key Features (Bullet Points)
High-Accuracy Digital Output: Delivers high-precision ambient readings with ±0.5°C temperature accuracy and ±2% to ±5% relative humidity accuracy.
Wide Operating Range: Measures temperature across a broad spectrum from -40°C to +80°C and humidity from 0% to 100% RH.
Single-Wire Digital Interface: Uses a single digital data pin for easy communication, eliminating the need for complex analog-to-digital conversions.
Pre-Calibrated & Stable: Factory-calibrated internal signal processing ensures long-term measurement stability and minimal drift over time.
Plug-and-Play Microcontroller Support: Operating voltage from 3.3V to 5.5V DC makes it natively compatible with Arduino, ESP32, ESP8266, and Raspberry Pi.
Product Overview & Description
The DHT22 (AM2302) Digital Temperature and Humidity Sensor Module is an upgraded, high-precision environmental sensor engineered for IoT projects, weather stations, smart agriculture, and HVAC control systems. Utilizing a capacitive humidity sensing element and a precision thermistor connected to a high-performance 8-bit microcontroller, the DHT22 outputs fully calibrated digital data over a single wire.
Compared to basic entry-level sensors like the DHT11, the DHT22 offers a significantly wider measurement range, higher resolution (0.1°C / 0.1% RH), and far superior sensing precision. Whether you are monitoring an automated greenhouse, logging climate data in server rooms, or building an IoT home automation hub, this module provides reliable, industrial-grade data with minimal wiring complexity.
