DHT22 Temperature & Humidity Sensor – High Accuracy Digital Sensor Module for Arduino, ESP32, Raspberry Pi & IoT Projects

Technical Specifications

• Sensor Model: DHT22 / AM2302
• Measurement Type: Digital Temperature & Humidity
• Operating Voltage: 3.3V – 5.5V
• Temperature Range: -40°C to +80°C
• Temperature Accuracy: ±0.5°C
• Humidity Range: 0–100% RH
• Humidity Accuracy: ±2–5% RH
• Sampling Rate: 0.5 Hz (1 reading every 2 seconds)
• Output Signal: Digital (Single-wire protocol)
• Response Time: < 2 seconds
• Body Type: Plastic housing
• Pins: VCC, Data, GND
• Applications: Weather stations, IoT systems, smart agriculture, room monitoring, HVAC control, automation, data logging

Technical Descriptions

The DHT22 Temperature and Humidity Sensor is a high-accuracy digital sensor ideal for monitoring environmental conditions in IoT and embedded systems. Capable of measuring temperatures from -40°C to +80°C and humidity from 0–100% RH, the DHT22 is widely used in weather stations, smart agriculture, home automation, and HVAC monitoring.

With its single-wire digital interface, the DHT22 is easy to connect to Arduino, ESP8266, ESP32, Raspberry Pi, and other microcontrollers. It provides stable, reliable, and precise readings, making it one of the most popular environment sensors for DIY and professional applications.

Whether you're building a greenhouse controller, a room climate monitor, or a complete IoT dashboard, the DHT22 delivers accurate data and long-term performance.