ARDUINO temperature and humidity sensor module

baby description 

1 can detect ambient humidity and temperature 

2 sensor DHT11 

3 Humidity measuring range: 20% -95% ( 0 degrees -50degrees) Humidity measurement error: + -5% 

4 Temperature measuring range: 0 degrees -50 degrees Temperature measurement error: + -2degrees 

4 Operating Voltage 3.3V-5V 

5 output format digital output 

6 with fixed bolt hole for easy installation 

7 small plates PCB size: 3.2cm * 1.4cm 
8 Power LED (red) 

9 Each weighs about 8g

module interface specification ( 3 -wire) 

1 VCC  external 3.3V-5V 

2 GND  External GND 

3 DO   small plate switch digital output interface connected microcontroller IO port