SKU: SENS-2829
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Keyestudio DHT11 Digital Temperature Humidity Sensor Module for Arduino

₹239.00 (Inclusive of all taxes)
Out of Stock

The Keyestudio DHT11 is a digital temperature and humidity sensor module featuring a calibrated digital signal output via a single-wire serial interface. It is designed for easy integration with 5V microcontrollers like Arduino, ESP8266, and STM32 for environmental monitoring applications.

Features

  • Digital output with single-wire serial interface for simplified microcontroller integration.
  • Integrated resistive humidity sensing element and NTC thermistor for combined measurement.
  • Factory calibrated for ±5% RH and ±2°C accuracy ensuring reliable readings.
  • Operates on a 5V DC supply with low power consumption for portable projects.
  • Compact PCB module design with a 20-meter maximum signal transmission range.

Out of stock

Description

The Keyestudio DHT11 module integrates a capacitive humidity sensor and a thermistor for temperature measurement, coupled with an onboard 8-bit microcontroller that handles analog-to-digital conversion and outputs a calibrated digital signal. This design eliminates the need for external signal conditioning, providing stable and reliable environmental data.

Communication is achieved through a proprietary single-wire serial protocol, requiring only one digital I/O pin on a host microcontroller like an Arduino Uno or ESP32. The module is suitable for basic environmental monitoring within its specified operating range of 0°C to 50°C and 20% to 90% relative humidity.

Key Features

  • Digital single-wire interface simplifies wiring and code integration with Arduino, Raspberry Pi, and other 5V logic platforms.
  • Factory-calibrated sensor ensures consistent accuracy of ±5% RH and ±2°C without user intervention.
  • Integrated signal processing via an onboard 8-bit microcontroller provides stable, low-noise digital output.
  • Compact and lightweight PCB module design is ideal for space-constrained applications and DIY electronics projects.
  • Low power consumption makes it suitable for battery-powered environmental monitoring systems.
  • 20-meter maximum signal transmission range allows for flexible sensor placement relative to the control unit.

Applications

  • Indoor climate monitoring and data logging for home automation systems.
  • Basic environmental sensing in Arduino-based educational kits and STEM projects.
  • Humidity and temperature feedback control in small-scale greenhouse or terrarium setups.
  • Condition monitoring for electronic enclosures or server racks.

Technical Specifications

Model NumberDHT11
Sensor TypeDigital Temperature & Humidity
Operating Voltage5V DC
Output InterfaceDigital (Single-Wire Serial)
Humidity Range20% - 90% RH
Humidity Accuracy±5% RH
Temperature Range0°C - 50°C
Temperature Accuracy±2°C
Dimensions (L x W)35mm x 20mm
Weight4g

Frequently Asked Questions

What is the operating voltage range for the Keyestudio DHT11 module?

The DHT11 module requires a strict 5V DC power supply. Applying voltages outside this range, such as 3.3V, may result in incorrect readings or damage the sensor. Always connect the VCC pin to a regulated 5V source from your microcontroller or power supply.

How do I connect and read data from the DHT11 using an Arduino?

Connect the module's VCC to Arduino 5V, GND to GND, and the DATA pin to a digital I/O pin (e.g., pin 2). Use a 5kΩ pull-up resistor between the DATA pin and VCC. You must use a dedicated library like 'DHT sensor library' to handle the timing-sensitive single-wire protocol and extract temperature and humidity values.

What is the difference between the DHT11 and DHT22/AM2302 sensors?

The DHT11 is a basic, cost-effective sensor with a measurement range of 0-50°C and 20-90% RH, with accuracies of ±2°C and ±5% RH. The DHT22 offers higher accuracy (±0.5°C, ±2-5% RH), a wider measurement range (-40 to 80°C, 0-100% RH), and a faster sampling rate, but at a higher cost. Choose based on your project's precision requirements.

What is the maximum recommended distance between the DHT11 and my microcontroller?

The manufacturer specifies a maximum signal transmission distance of 20 meters. For reliable communication, use a high-quality shielded cable and keep the distance as short as practical. Over long distances, signal integrity may degrade due to electrical noise, potentially causing communication failures.

Package Includes

  • 1 x Keyestudio DHT11 Temperature Humidity Sensor Module

Additional Information

Weight 0.004 kg
Dimensions 3.5 × 2 cm