DHT22 (AM2302) Temperature & Humidity Sensor Module
DHT22 (AM2302) Temperature & Humidity Sensor Module - Image 2
DHT22 (AM2302) Temperature & Humidity Sensor Module - Image 3

DHT22 (AM2302) Temperature & Humidity Sensor Module

₹125.00

Overview

The DHT22 (also widely known as AM2302) is a high-precision, low-cost digital temperature and humidity sensor. The image depicts the DHT22 mounted on a breakout PCB module equipped with built-in pull-up resistors and decoupling capacitors, making it ready for immediate integration with microcontrollers such as Arduino, ESP32, ESP8266, and Raspberry Pi.

Utilizing a capacitive humidity sensing element and a thermistor, the module delivers a calibrated digital signal output over a single-bus (1-Wire) protocol. Compared to its predecessor (DHT11), the DHT22 offers higher accuracy, a broader temperature/humidity measurement range, and higher precision.

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Description

Module Pinout Configuration

Pin Label Description
1 VCC (+) Power Supply (3.3V – 5.5V DC)
2 OUT / DATA Digital Data Output (Single-Bus Signal)
3 GND (-) Ground Connection (0V)

 

Key Specifications

Parameter Specification / Range
Operating Voltage 3.3V to 5.5V DC
Humidity Measuring Range 0% to 100% Relative Humidity (RH)
Humidity Accuracy ±2% RH (Max ±5% RH)
Humidity Resolution 0.1% RH
Temperature Measuring Range -40°C to +80°C (-40°F to +176°F)
Temperature Accuracy < ±0.5°C
Temperature Resolution 0.1°C
Sampling Rate / Interval 0.5 Hz (One reading every 2 seconds)
Output Interface 1-Wire / Single-Bus Digital Protocol

 

Key Features & Advantages

  • Integrated Breakout Module: Includes essential surface-mount pull-up resistor and filter capacitor, eliminating the need for external breadboard components.
  • Long-Distance Transmission: Supports signal transmission over distances up to 20 meters.
  • Ultra-Low Power Consumption: Minimal current draw during measurement (~1.5mA) and standby (~50µA).
  • High Precision & Stability: Factory calibrated with digital outputs ensuring long-term stability and reliability.

Applications and Uses

  • HVAC Systems & Climate Control: Monitoring and regulating ambient temperature and humidity in heating, ventilation, and air-conditioning units.
  • Weather Stations & Environmental Monitoring: Building indoor or outdoor IoT weather monitoring nodes.
  • Smart Agriculture & Greenhouses: Automating irrigation, misting, and ventilation systems by monitoring greenhouse microclimates.
  • Data Centers & Server Rooms: Ensuring server environments maintain optimal humidity levels to prevent electrostatic discharge or condensation.
  • Home Automation & Smart Thermostats: Integrating with platforms like Home Assistant, ESPHome, or openHAB for climate automation.
  • Food Storage & Warehousing: Monitoring environmental conditions in cold storage, pharmaceutical storage, and grain silos.

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DHT22 (AM2302) Temperature & Humidity Sensor Module

₹125.00