The DHT11 Digital Temperature and Humidity Sensor Module is one of the most popular, cost-effective environmental sensors available for makers, students, and engineers. Designed to measure ambient room conditions, it integrates a resistive humidity measurement component, an NTC temperature measurement component, and an 8-bit microcontroller that outputs pre-calibrated digital signals.

Unlike standalone 4-pin DHT11 sensors that require manual breadboard wiring and an external resistor, this 3-pin breakout module comes with an onboard 10kΩ pull-up resistor and a power indicator LED. Utilizing a single-wire digital interface, it transmits data reliably using only a single GPIO pin on your development board.

Technical Specifications

Pinout Description

• VCC: 3.3V – 5.5V Power Supply input.

• DATA / OUT: Digital signal output pin (Connects to microcontroller GPIO).

• GND: Ground connection.

Basic Arduino Connection & Example Code

Wiring

• VCC ➔ Arduino 5V (or 3.3V)

• GND ➔ Arduino GND

• DATA ➔ Arduino Digital Pin 2

// Requires the "DHT sensor library" by Adafruit
#include <DHT.h>

#define DHTPIN 2       // Digital pin connected to the DHT11
#define DHTTYPE DHT11  // DHT 11

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);
  Serial.println(F("DHT11 Climate Sensor Test"));
  dht.begin();
}

void loop() {
  // Wait 1.5 - 2 seconds between measurements
  delay(2000);

  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature(); // Celsius

  if (isnan(humidity) || isnan(temperature)) {
    Serial.println(F("Failed to read from DHT11 sensor!"));
    return;
  }

  Serial.print(F("Humidity: "));
  Serial.print(humidity);
  Serial.print(F("%  |  Temperature: "));
  Serial.print(temperature);
  Serial.println(F("°C"));
}

Key Features & Highlights

• Plug-and-Play Breakout Board: Onboard pull-up resistor and power status LED eliminate the need for breadboard components.

• Low Power Consumption: Minimal current draw during measurement makes it suitable for low-power battery nodes.

• Single-Bus Digital Interface: Transmits full temperature and relative humidity data frames over a single data line.

• 3.3V & 5V Logic Compatible: Operates seamlessly with 3.3V microcontrollers (ESP8266, ESP32, Raspberry Pi Pico) and 5V microcontrollers (Arduino Uno, Nano, Mega).

Common Applications

• Indoor room temperature and humidity monitoring nodes.

• Automatic fan, humidifier, or ventilation control triggers.

• STEM education projects, beginner electronics kits, and weather stations.

• Basic greenhouse and indoor plant condition tracking.

What’s Included in the Box

• 1 × DHT11 Digital Temperature and Humidity Sensor Breakout Module

• 1 × 3-Pin Female-to-Female Jumper Cable Wire

Why Buy From Aryabot?

• 100% Quality Assured: Pre-tested modules verified for proper signal timing and stable digital readings.

• GST Invoice Provided: Tax-compliant B2B invoices generated for commercial projects, educational institutions, and research labs.

• Pan-India Express Shipping: Fast processing and reliable delivery direct from our Noida distribution warehouse.