Temperature and Humidity Sensor DHT22 (AM2302)

The DHT22 (AM2302) digital sensor module is designed for precise measurement of environmental parameters in climate control systems, weather stations and smart homes. High accuracy: Compared with the basic DHT11, the DHT22 offers a wider measurement range and higher accuracy (up to 0.5°C for temperature and 2% for humidity). Ready-to-use module: The board features a built-in pull-up resistor on the data line and a filter capacitor, allowing the sensor to be connected directly to microcontrollers without external circuitry. Digital interface: Data is transmitted over a single digital pin using a noise-resistant protocol with checksum. Features Model — DHT22 / AM2302 Temperature measurement range — from -40°C to +80°C (accuracy ±0.5°C) Humidity measurement range — from 0% to 100% RH (accuracy ±2–5% RH) Operating voltage — 3.3 V – 5.5 V DC Communication interface — Single-wire digital protocol (Single-Bus / 1-Wire) Polling period — 0.5 Hz (one measurement every 2 seconds) Built-in circuitry — 10 kΩ pull-up resistor already soldered on the board Board dimensions — 28 × 15 mm