SPecifications
Measures temperature and humidity
Factory-calibrated digital output
Low power consumption
Long-term stability
wire communication (single data line)
Pre-calibrated with an internal sensor
Operating Voltage: 3.3V to 5V DC
Maximum Current Consumption: 2.5mA
Output Signal: Digital (single-wire communication)
Sampling Rate: 1 Hz (one reading per second)
 Humidity Measurement:
Range: 20% to 90% Relative Humidity (RH)
Accuracy: ±5% RH
Resolution: 1% RH
 Temperature Measurement:
Range: 0°C to 50°C
Accuracy: ±2°C
Resolution: 1°C
Physical Specifications:
Dimensions: 15.5mm × 12mm × 5.5mm
Weight: ~2.4g
Pinout:
VCC: Power Supply (3.3V–5V)
Data: Data Output (connected to a pull-up resistor)
NC: Not Connected (no use)
GND: Ground
Advantages of DHT11:
Low cost
Simple interface
Pre-calibrated for easy use
Limitations:
Limited temperature range (0°C to 50°C)
Lower accuracy compared to DHT22
Slower response time (1 second per reading)