DHT11 Temperature and Humidity Sensor Module with LED Indicator
Product Description
The DHT11 Temperature and Humidity Sensor Module is a compact digital environmental sensor designed to measure temperature and relative humidity. It comes mounted on a PCB with an LED indicator, making it easy to connect to Arduino, ESP32, ESP8266, and other compatible microcontrollers.
The DHT11 provides calibrated digital temperature and humidity readings through a single data pin. The module includes a built-in pull-up resistor, simplifying connections and reducing the need for additional external components.
With a 3V to 5V operating supply, simple digital communication, and easy integration, this sensor is suitable for weather monitoring, smart home projects, environmental monitoring, and educational electronics applications.
Key Features
Temperature Measurement: Measures ambient temperature from 0°C to 50°C.
Humidity Measurement: Measures relative humidity in the surrounding environment.
Digital Output: Sends temperature and humidity data through a single digital data pin.
LED Indicator: Onboard LED provides a visual power/status indication (depending on board design).
Built-in Pull-up Resistor: PCB includes a 4.7KΩ or 10KΩ pull-up resistor, depending on the module version.
Wide Supply Range: Operates with a 3V to 5V supply.
Low Power Consumption: Maximum current consumption of approximately 2.5mA during measurement (supplier specification).
Easy Integration: Compatible with Arduino, ESP32, ESP8266, and other supported microcontrollers.
Simple Wiring: Convenient 4-pin module layout with 0.1-inch spacing.
Technical Specifications
Parameter | Specification |
Sensor Model | DHT11 |
Sensor Type | Digital Temperature and Humidity Sensor |
Temperature Range | 0°C to 50°C |
Temperature Accuracy | ±2°C |
Humidity Range | 20% to 80% RH (specified range) |
Humidity Accuracy | ±5% RH |
Operating Voltage | 3V – 5V |
Maximum Current | Approximately 2.5mA during measurement |
Communication | Single-wire digital interface |
Pull-up Resistor | 4.7KΩ or 10KΩ (board dependent) |
Indicator | Onboard LED |
Connector | 4-pin, 0.1-inch spacing |
Compatible Platforms | Arduino, ESP32, ESP8266 and compatible controllers |
Pin Configuration
Pin | Function |
VCC | Power supply (3V–5V) |
DATA | Digital temperature and humidity signal |
NC | Not connected |
GND | Ground |
Check the actual PCB pin labels before wiring, as pin order can vary between module versions.
Applications
Weather monitoring stations
Indoor temperature and humidity monitoring
Smart home automation
Greenhouse monitoring systems
Environmental monitoring projects
Temperature-controlled fans
Arduino and ESP32 projects
IoT-based monitoring systems
School and college science projects
DIY electronics and STEM experiments
Package Includes
1 × DHT11 Temperature and Humidity Sensor Module with LED Indicator
3 × Female-to-Female Connecting Cables
Important Notes
The DHT11 is suitable for basic environmental monitoring, not high-precision measurement applications.
Its specified measurement ranges are 0°C–50°C for temperature and 20%–80% RH for humidity.
Allow sufficient time between readings; the DHT11 should generally not be sampled faster than once every 1–2 seconds.
The built-in pull-up resistor value may vary between module versions.
Check the DATA pin voltage compatibility before connecting the module to a 3.3V microcontroller such as ESP32.
Keep the sensor away from direct water contact, condensation, and excessive heat.
