DHT11 is a common digital temperature and humidity sensor, widely used in electronic projects and Internet of Things (IoT) devices.

Features
Measurement range:
Temperature: 0°C ~ 50°C, accuracy ±2°C
Humidity: 20% ~ 90% RH, accuracy ±5% RH
Voltage range: 3V ~ 5.5V
Output signal: digital signal (single bus communication)
Small size: easy to integrate into various electronic devices
Low power consumption: suitable for battery-powered applications

Features
Easy to use: only one data line is needed to transmit temperature and humidity data.
Built-in signal processor: The analog-to-digital (ADC) function is integrated internally to output a stable digital signal.
Affordable price: suitable for education, DIY and small electronic projects.
High stability: suitable for temperature and humidity detection in general environments.

Pin function
DHT11 sensor usually has 3 pins, marked as follows:

VCC: positive power supply (3V~5.5V)

DATA: data signal line (connected to the I/O pin of the microcontroller)

GND: negative power supply