What is the DHT11?
The DHT11 Digital Temperature and Humidity Sensor Module with Cable is a reliable and easy-to-use sensor, perfect for basic environmental monitoring projects. It provides accurate temperature measurements from 0 to 50℃ with a precision of ±2℃ and humidity measurements from 20% to 80% RH with an accuracy of ±5%. This sensor is ideal for home automation, weather stations, and other DIY applications, seamlessly integrating with Raspberry Pi, Arduino, ESP32, and other microcontrollers.
Operating Mechanisms of the DHT11
The DHT11 operates by utilizing its integrated sensors to measure temperature and humidity with reliable accuracy. Here's a breakdown of its operating mechanisms:
- Temperature Measurement: The DHT11 measures temperature in the range of 0 to 50℃ with an accuracy of ±2℃. This makes it suitable for a variety of basic temperature monitoring applications.
- Humidity Measurement: The DHT11 measures humidity from 20% to 80% RH with an accuracy of ±5%, providing dependable data for environmental monitoring.
- Digital Output: The DHT11 outputs a single-bus digital signal, facilitating straightforward integration with microcontrollers.
- Visualization with LED: The built-in LED indicator offers a quick visual cue, allowing you to easily interpret temperature and humidity trends at a glance.
- Plug and Play Convenience: The included cable simplifies the setup process, making it easy for users to integrate the DHT11 into their projects without hassle.
By combining these mechanisms, the DHT11 provides a reliable solution for environmental sensing, making it an essential component in many basic electronic projects.
Pins
DHT11 Pinout
VCC (Power Supply: +3.3V to +5V)
This pin is used to supply power to the DHT11. The sensor operates within a voltage range of 3.3V to 5V.
Connection: Connect this pin to the 3.3V or 5V power supply from your microcontroller or development board.
GND (Ground)
This pin is the ground connection for the sensor. It should be connected to the ground of your power supply or microcontroller.
Connection: Connect this pin to the ground (GND) of your microcontroller or development board.
OUT (Serial Data)
This pin is used for the digital data signal. It transfers temperature and humidity data to the microcontroller.
Connection: Connect this pin to a digital I/O pin on your microcontroller.
Technical Specifications
| Specification | Details |
|---|---|
| Temperature Range | 0 to 50℃ |
| Temperature Accuracy | ±2℃ |
| Humidity Range | 20% to 80% RH |
| Humidity Accuracy | ±5% |
| Power Supply | 3.3V to 5V |
| Output Signal | Digital |
| Dimensions | 15.5 x 12 x 5.5mm |
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