The DHT11 is a low-cost digital sensor that provides temperature and humidity readings with a single-wire serial interface. Ideal for weather stations, indoor climate monitoring, and HVAC systems, it offers reliable performance with minimal power consumption.
Key Benefits
✔ Integrated Sensing – Measures humidity + temperature in one module
✔ Simple Interface – Single-wire digital output (no analog calibration needed)
✔ Low Power – Energy-efficient for battery-powered projects
✔ Compact & Lightweight – Easy to mount in tight spaces
Technical Specifications
Core Specifications
Humidity Range: 20–90% RH (±5% accuracy)
Temperature Range: 0–50°C (±2°C accuracy)
Response Time: 1–2 seconds
Sampling Rate: 1Hz (once per second)
Electrical Characteristics
Operating Voltage: 3.3V – 5.5V DC
Current Consumption: 0.5mA (idle) / 2.5mA (measuring)
Output Signal: Digital (single-bus protocol)
Physical Properties
Dimensions: 23mm × 12mm × 5mm
Sensor Type: Resistive humidity + NTC thermistor
Pinout: VCC, GND, DATA (3-pin)
Why Choose the DHT11?
✔ Plug-and-Play – Works with Arduino, ESP8266, Raspberry Pi
✔ Cost-Effective – Budget-friendly for hobbyists & prototypes
✔ Wide Compatibility – Libraries available for most platforms
Common Applications:
Home weather stations
Greenhouse monitoring
Smart thermostats
Dehumidifier control
Pro Tip: For better accuracy, avoid direct sunlight/moisture exposure!
Package Includes:
1 x DHT11 Humidity and Temperature Sensor Module