DHT11 Digital Humidity & Temperature Sensor Module For AVR/STM/PIC

The DHT11 is a low-cost digital sensor used for measuring temperature and humidity. It is widely used in hobbyist and DIY projects due to its simplicity and ease of integration with microcontrollers like the Arduino. Here are some key features and specifications of the DHT11 sensor:
Features

- Digital Output: The sensor provides a digital signal output, making it easy to interface with microcontrollers.
- Single-Wire Interface: Uses a single data wire for communication, simplifying wiring and reducing the number of required pins.
- Pre-calibrated: Comes pre-calibrated, so no additional calibration is necessary.
- Low Power Consumption: Consumes very little power, making it suitable for battery-operated devices.

Specifications

- Humidity Range: 20-90% Relative Humidity (RH)
- Humidity Accuracy: ±5% RH
- Temperature Range: 0-50°C
- Temperature Accuracy: ±2°C
- Resolution:
- - Humidity: 1% RH
- - Temperature: 1°C
- Operating Voltage: 3.5 - 5.5V
- Sampling Rate: 1 Hz (one reading per second)
- Dimensions: Small and compact, typically around 15.5mm x 12mm x 5.5mm (L x W x H)
- Output Signal: Digital signal on a single wire

Pinout

The DHT11 sensor usually has 3 or 4 pins:

- VCC: Power supply (3.5 - 5.5V)
- GND: Ground
- DATA: Data pin for digital signal output
- NC: Not connected (only present on some versions)

Applications

- Home automation systems for monitoring temperature and humidity.
- Weather stations and environmental monitoring.
- HVAC systems to control air quality.
- Agricultural projects for monitoring conditions in greenhouses or fields.
- Educational and DIY projects for learning about sensors and microcontroller interfacing.