The DHT11 Temperature & Humidity Sensor Module provides digital measurements of ambient temperature and relative humidity through a simple single-wire communication interface.
It is a popular entry-level sensor for learning how electronic systems can collect real-world environmental data. Students and developers can use the DHT11 to build projects that monitor room conditions, display temperature and humidity readings, record environmental data, or trigger an action when a programmed condition is reached.
The sensor supports a temperature measurement range of 0°C to 50°C and a relative humidity measurement range of approximately 20% to 90% RH, with typical accuracy of ±2°C for temperature and ±5% RH for humidity.
Its digital output makes it convenient to interface with compatible microcontrollers without requiring an external analog-to-digital conversion stage for the sensor readings.
The DHT11 is especially suitable for beginner and intermediate electronics projects where students need to understand sensor data, conditional logic, environmental monitoring, IoT concepts, and automation.
Detailed Product Specifications
| Specification | Details |
|---|---|
| Sensor Type | Digital Temperature & Relative Humidity Sensor |
| Sensor Model | DHT11 |
| Temperature Measurement Range | 0°C to 50°C |
| Temperature Accuracy | ±2°C |
| Humidity Measurement Range | 20% to 90% RH |
| Humidity Accuracy | ±5% RH |
| Operating Voltage | 3.3V to 5.5V DC |
| Output Type | Digital |
| Communication Interface | Single-Wire Digital Interface |
| Temperature Resolution | 1°C |
| Humidity Resolution | 1% RH |
| Recommended Sampling Interval | More than 2 seconds |
| Application | Environmental Monitoring, IoT, Automation, STEM & Robotics |
| Quantity | 1 Piece |
The DHT11 documentation specifies a 3.5–5.5V supply for the sensor itself, while commonly sold modules are listed for 3.3–5V operation. The Robu listing for this module specifies 3.3–5V, making that the practical listing value for this product.
Key Features
- Measures both temperature and relative humidity
- Digital sensor output
- Simple single-wire communication
- Easy to interface with microcontroller projects
- Suitable for Arduino-based projects
- Useful for ESP8266 and ESP32 projects
- Factory-calibrated digital sensing
- Low-power operation
- Suitable for environmental monitoring and data logging
- Beginner-friendly sensor for electronics and IoT learning
- Useful for STEM, robotics and automation projects
Recommended Applications
- Digital weather stations
- Indoor temperature monitoring
- Humidity monitoring
- Environmental data logging
- Smart agriculture prototypes
- Greenhouse monitoring projects
- IoT environmental monitoring
- Automatic fan-control projects
- Temperature and humidity display systems
- Home automation prototypes
- Arduino projects
- ESP8266 and ESP32 IoT projects
- STEM and robotics experiments
Educational Applications
The DHT11 is particularly useful for teaching students how physical environmental conditions can be converted into digital information.
Students can use it to learn:
- Temperature sensing
- Relative humidity measurement
- Digital sensor interfacing
- Single-wire communication
- Arduino programming
- ESP8266/ESP32 programming
- Sensor data logging
- Conditional programming
- IoT fundamentals
- Environmental monitoring
- Automation logic
- Basic weather station development
How It Can Be Used
The sensor can be connected to a compatible microcontroller and programmed to read temperature and humidity values.
For example, students can create a system that:
DHT11 → Microcontroller → Program Logic → Display / Data Logging / Automated Action
A temperature threshold can be programmed to activate a fan, while humidity readings can be recorded for an environmental monitoring project.
Compatibility
Suitable for projects using compatible:
- Arduino boards
- ESP8266 development boards
- ESP32 development boards
- Other compatible microcontrollers supporting the DHT11 digital interface
Appropriate libraries are available in common Arduino development environments, making the sensor convenient for educational and prototyping applications.
What’s Included
- 1 × DHT11 Temperature & Humidity Sensor Module
Important Notes
- DHT11 is an entry-level environmental sensor and is intended for general-purpose measurement and educational/prototyping applications.
- Temperature measurement range is limited to 0°C to 50°C.
- Humidity measurement range is approximately 20% to 90% RH.
- Allow sufficient time between sensor readings according to the sensor’s operating requirements.
- Measurement accuracy can be affected by environmental conditions, airflow, condensation and sensor placement.
- Do not expose the sensor to water or direct liquid contact.
- Use the appropriate supply voltage and wiring for the connected microcontroller.
Why Choose the DHT11?
The DHT11 Temperature & Humidity Sensor Module is an affordable and easy-to-use way to introduce environmental sensing into electronics and IoT projects. Its digital output, simple communication interface and widely supported development ecosystem make it particularly suitable for students, educators, makers and beginners learning Arduino, IoT and sensor-based automation.
Product Summary
The DHT11 Temperature & Humidity Sensor Module is a digital environmental sensor capable of measuring 0°C to 50°C temperature and approximately 20% to 90% relative humidity. With ±2°C temperature accuracy, ±5% RH humidity accuracy and a single-wire digital interface, it is an excellent choice for Arduino, ESP8266, ESP32, IoT, weather station, automation, environmental monitoring and STEM education projects.
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