Sensors 4 pins

DHT11

Basic digital temperature and humidity sensor. Single-wire, 0-50C range.

// connector diagram 4 pins

// loading diagram...

// Specifications

Supply Voltage

3V – 5.5V

Temp Range

0°C – 50°C

Temp Accuracy

±2°C

Humidity Range

20–80% RH

Humidity Accuracy

±5% RH

Sample Rate

1 Hz

// Pin Reference Table

Pin	Name	Function	Type
1	VCC	Power supply 3V–5.5V	PWR
2	DATA	Single-wire data, 4.7k pull-up	BUS
3	NC	Not connected	GND
4	GND	Ground	GND

The DHT11 is a basic, low-cost digital temperature and humidity sensor. It uses a single-wire protocol and is less accurate than the DHT22, but fine for non-critical applications. It measures 0–50°C temperature and 20–80% humidity.