사용 센서 : DHT11 MODULE
Power: DC 3~5V
Pins: G (GND) – D (Data) – V (VCC)
Humidity Measurement: 20~80% humidity reading with 5% accuracy
Temperature Measurement: 0~50°C temperature reading with ±2°C accuracy
Should not measure more than once per second
How to Set Up the DHT11 Humidity Sensor on the Raspberry Pi
#!/usr/bin/python
import sys
import Adafruit_DHT
while True:
humidity, temperature = Adafruit_DHT.read_retry(11, 4)
print ('Temp: {0:0.1f} C Humidity: {1:0.1f} %'.format(temperature, humidity))
Adafruit_DHT ; invalid module error
-> Adafruit_Python_DHT 로 수정. -> sudo apt-get upgrade
POSTECH 78 stairs Piano Project 
Traceback (most recent call last):
File “/home/pi/hum.py”, line 7, in
humidity, temperature = Adafruit_Python_DHT.read_retry(11, 4)
AttributeError: module ‘Adafruit_Python_DHT’ has no attribute ‘read_retry’
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