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DHT11 Digital Temperature & Humidity Sensor Module, 3.3V–5V Single-Wire Output, Fast DIY Weather/Room Monitoring Sensor for Arduino UNO Nano ESP32 (3.3V Logic) and Raspberry Pi
The DHT11 Digital Temperature & Humidity Sensor Module is a popular, beginner-friendly sensor for measuring ambient temperature and relative humidity in DIY electronics projects.
The DHT11 Digital Temperature & Humidity Sensor Module is a popular, beginner-friendly sensor for measuring ambient temperature and relative humidity in DIY electronics projects. It combines both readings in one compact board and outputs the data digitally using a simple single-wire protocol, making it easy to integrate with Arduino and Raspberry Pi projects using widely available libraries.
This module is perfect for basic environmental monitoring such as room climate tracking, small DIY weather stations, greenhouse monitoring, IoT prototypes, and educational STEM projects. Because it’s a module (not just the bare sensor), it typically includes the needed resistor/pull-up and pins for quicker prototyping.
Key Features & Benefits
- Two-in-One Sensor: Temperature + humidity readings from a single module
- Digital Output: Stable signal without analog noise and easy microcontroller reading
- Simple Wiring: 3-pin interface for quick breadboard and jumper-wire setups
- Wide Power Range: Works on 3.3V and 5V power systems
- Library Support: Supported by common Arduino and Raspberry Pi libraries
- Great for Learning: Ideal for beginners, classrooms, and quick prototypes
Typical Specifications
| Item | Typical Value |
|---|---|
| Sensor | DHT11 |
| Measurements | Temperature + Relative Humidity |
| Temperature Range | 0°C to 50°C |
| Humidity Range | 20% to 90% RH |
| Accuracy (Typical) | ±2°C (temp), ±5% RH (humidity) |
| Output | Digital single-wire protocol |
| Supply Voltage | 3.3V–5V DC |
| Update Rate | ~1 reading per second |
Note: For higher accuracy and wider range, consider DHT22/AM2302. DHT11 is best for basic monitoring and learning projects.
Pinout (Common Module Layout)
Most DHT11 modules use:
| Pin | Function |
|---|---|
| VCC | 3.3V–5V power |
| DATA | Digital output to MCU GPIO |
| GND | Ground |
Common Applications
- DIY weather station and indoor climate display
- Smart home monitoring (basic temperature/humidity logging)
- Greenhouse/terrarium monitoring (basic range)
- STEM experiments and electronics education
- IoT prototypes with Arduino/ESP boards
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