old_contents: #!/usr/bin/env python
  #Weather station.
  #detect environment information from several sensors:
  #water leverl, air humity, raining, air temperature, light sensitivity.
  #Air temperature&humity sensor: DHT11.
  #Add dht.py in micropython/stmhal/modules， refer to esp8266
  #Compile the DHT in firmware, then use DHT lib in application.
  #Raining, same to soil moisture.
  #Raining ? DO value: 0 
  from pyb import Pin
  p_in = Pin('Y12', Pin.IN, Pin.PULL_UP)
  p_in.value
  
  
  adc = pyb.ADC(Pin('Y11'))       # create an analog object from a pin
  adc = pyb.ADC(pyb.Pin.board.Y11)
  val = adc.read()                # read an analog value
  
new_contents: #!/usr/bin/env python
  #Weather station.
  #detect environment information from several sensors:
  #water leverl, air humity, raining, air temperature, light sensitivity.
  #Air temperature&humity sensor: DHT11.
  #Add dht.py in micropython/stmhal/modules， refer to esp8266
  #Compile the DHT in firmware, then use DHT lib in application.
  #Raining, same to soil moisture.
  #Raining ? DO value: 0 
  from pyb import Pin
  p_in = Pin('Y12', Pin.IN, Pin.PULL_UP)
  p_in.value
  
  
  adc = pyb.ADC(Pin('Y11'))       # create an analog object from a pin
  adc = pyb.ADC(pyb.Pin.board.Y11)
  val = adc.read()                # read an analog value
  
  #Light intensity sensor(GY-30)
  
subject: Update env_detect.py