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The ASAIR AM2302 Digital Temperature & Humidity Sensor, also known as the wired version of the DHT22, is a high-precision digital sensor designed for accurate environmental monitoring in electronics, IoT, automation, and embedded system projects. It combines a capacitive humidity sensing element and a high-accuracy thermistor to measure relative humidity and ambient temperature with excellent reliability.

Unlike analog sensors, the AM2302 outputs a calibrated digital signal, eliminating the need for analog-to-digital conversion and making integration simple with popular development platforms such as Arduino Boards, Raspberry Pi Boards, ESP32 Development Boards, ESP8266 Development Boards, STM32 Development Boards, and other microcontrollers.

Offering a humidity measurement range of 0–100% RH with ±2–5% RH accuracy and a temperature range of -40°C to 80°C with ±0.5°C accuracy, the AM2302 is ideal for weather stations, smart home automation, agriculture, industrial monitoring, and educational projects. You can also explore our complete range of Temperature & Humidity Sensors for similar environmental sensing solutions.

The sensor includes an internal pull-up resistor, operates from 3V–5V, and communicates over a single digital data line, providing reliable performance while requiring minimal external components.

Features High-Accuracy Temperature & Humidity Measurement Measures temperature from -40°C to 80°C with ±0.5°C accuracy and relative humidity from 0–100% RH with ±2–5% RH accuracy, making it suitable for precision monitoring applications.

Digital Signal Output Outputs calibrated digital data directly, eliminating analog signal noise and simplifying interfacing with microcontrollers.

Built-in Pull-Up Resistor Includes an internal 5.1kΩ pull-up resistor, reducing external components and simplifying circuit design.

Wide Operating Voltage Operates from 3V to 5V DC, making it compatible with most popular embedded development boards.

Easy Microcontroller Integration Supports Arduino, Raspberry Pi, ESP32, ESP8266, STM32, and many other embedded platforms using a single-wire digital communication interface

Stable Long-Term Performance Factory calibrated for reliable and repeatable environmental measurements over extended operating periods.

Low Power Consumption Consumes minimal power, making it suitable for battery-powered IoT devices and wireless sensor nodes built using ESP32 Development Boards.