DHT11 Temperature and Humidity Sensor Module

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DHT11 Temperature and Humidity Sensor Module

The DHT11 is a widely used digital sensor designed to measure temperature and humidity. For applications requiring higher accuracy and a wider sensing range, the upgraded DHT22 sensor is also available.

The DHT11 combines a capacitive humidity sensing element with a thermistor-based temperature sensor to monitor ambient environmental conditions. It measures humidity levels from 20% to 90% RH with an accuracy of ±5% RH and temperature from 0°C to 50°C with an accuracy of ±2°C. The sensor updates its readings every 2 seconds.

Unlike analog sensors, the DHT11 communicates digitally through a single data pin, making it easy to interface with microcontrollers such as Arduino, ESP32, Raspberry Pi Pico, and other development boards.

The module version of the DHT11 includes a built-in pull-up resistor and filtering capacitor, allowing direct connection to a microcontroller without requiring additional external components.

Pin Configuration

Wiring Instructions

Connect the VCC pin to a 3.3V–5.5V power source and the GND pin to ground. Connect the DATA pin to any digital I/O pin of the microcontroller. A suitable DHT11 library can then be used to read temperature and humidity values from the sensor.

Technical Specifications

• Operating Voltage: 3.3V to 5.5V DC
• Communication Interface: Digital I/O
• Sampling Rate: 0.5 Hz (One reading every 2 seconds)
• Operating Current: 0.3 mA
• Low Power Consumption
• Temperature Measurement Range: 0°C to 50°C
• Humidity Measurement Range: 20% to 90% RH
• Temperature Accuracy: ±2°C
• Humidity Accuracy: ±5% RH
• Dimensions: 3.5 × 2 × 6.5 cm

Package Contents

• 1 × DHT11 Temperature and Humidity Sensor Module