DHT22 Digital Temperature and Humidity Sensors AM2302 Module With Cable For Arduino – KSH 500 at HIMASTORES Mombasa – best electronics in Kenya
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DHT22 Digital Temperature and Humidity Sensors AM2302 Module With Cable For Arduino

SKU: HMJ742 Category: Sensors
KSH 500.00
In Stock

Product Description

DHT22 Digital Temperature and Humidity Sensor Module (AM2302)

High-Precision Environmental Sensor with Cable for Arduino

The DHT22 (also known as the AM2302) is a highquality digital temperature and humidity sensor offering better accuracy and a wider measurement range than its popular counterpart, the DHT11 [citation:2][citation:6]. This module comes with a convenient PCB and cable, making it a plugand-play solution for Arduino projects that require reliable environmental monitoring.

Superior Accuracy Temperature accuracy of ±0.5°C and humidity accuracy of ±2% RH for professionalgrade readings.
Wide Measurement Range Covers 40°C to +80°C and 0-100% RH, suitable for extreme environments [citation:2][citation:9].
Operating Voltage: 3.0V to 5.5V DC [citation:2][citation:8].
Interface: Single-wire digital signal output [citation:1].
The sensor uses a 1-wire protocol with only one data pin, simplifying wiring and coding [citation:12].

Technical Specifications

ParameterValue
:-:-
Temperature Range-40°C to +80°C [citation:2][citation:6]
Temperature Accuracy±0.5°C [citation:2][citation:9]
Humidity Range0 to 100% RH [citation:2][citation:6]
Humidity Accuracy±2 to 5% RH (typically ±2%) [citation:2][citation:9]
Resolution0.1°C / 0.1% RH [citation:6][citation:8]
Sampling Rate0.5 Hz (one reading every 2 seconds) [citation:9][citation:12]
Cable LengthTypically 23cm with 3 wires (VCC, DATA, GND) [citation:9]

= Key Features =

+*High Precision & Stability* Features a calibrated capacitive humidity sensor and thermistor with longterm stability [citation:2][citation:8].

+*SingleBus Digital Output* The data pin sends a calibrated digital signal, eliminating the need for analog input pins [citation:9].

+*Low Power Consumption Ideal for batterypowered IoT applications, drawing only about 2.5mA* during conversion [citation:9][citation:12].

+*Easy Integration* The module format makes wiring simple, and the onboard PCB often integrates the required pull-up resistor [citation:9].

= Applications =

  1. Weather stations and environmental data logging [citation:1].
  2. HVAC system control and monitoring [citation:2].
  3. Smart home automation and greenhouse projects.
  4. Industrial and agricultural temperature/humidity sensing.
ProfessionalGrade Upgrade A significant step up from the DHT11, making it ideal for serious projects.
BeginnerFriendly Uses the same simple interface and library as the DHT11.

√ Compatible with Arduino, ESP32, and Raspberry Pi [citation:9].

√ Standard 3-wire cable for simple connection (Red5V, YellowData, Black=GND) [citation:1].

√ Wide voltage range supports both 3.3V and 5V logic.

Connection and Usage Tips

Connecting the module is straightforward:

  • *Red Wire: Connect to 5V* on the Arduino.
  • *Yellow Wire:* Connect to a digital pin (e.g., Pin 2).
  • *Black Wire: Connect to GND*.

No external pull-up resistor is required if the module's PCB includes one, which is typical for these modules [citation:9].

Use the DHT sensor library from the Arduino Library Manager for easy code implementation [citation:12].
Because the sensor is slow, ensure you wait at least 2 seconds between requesting data for best results [citation:4].