old_contents: #--------------------------------------
  #    ____     ____
  #   / __/__  / __/
  #  _\ \/ _ \_\ \
  # /___/ .__/___/
  #    /_/
  #
  #           dev_detect.py
  #  Environment detection.
  #
  # Author : Arvin
  # Date   : 15/09/2017
  #--------------------------------------
  
  #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) <--> I2C(1)
  #SDA <--> X10
  #SCL <--> X9
  #VCC
  #GND
  #ADO(ADDR/address) <--> None
  #Command list:
  #0x00 power off
  #0x01	power on
  #0x07	reset
  #0x10	Continuously H-Resolution Mode, 1lx resolution, measurement time is typically 120ms
  #0x11	0.5lx, 120ms
  #0x13	4lx, 16ms
  
  from pyb import I2C
  
  i2c = I2C(1, I2C.MASTER)             # create and init as a master
  
  i2c.send(0x10, 0x23)        # send 3 bytes to slave with address 0x23
  
  i2c.is_ready(0x23)           # check if slave 0x23 is ready
  i2c.scan()                   # scan for slaves on the bus, returning
  
  i2c.mem_read(3, 0x23, 2)     # read 3 bytes from memory of slave 0x23,
                               #   starting at address 2 in the slave
  
  
new_contents: #--------------------------------------
  #    ___ _      ____
  #   / __(_)__  / __/
  #  _\ \/ / _ \_\ \
  # /___/_/ .__/___/
  #      /_/
  #
  #           dev_detect.py
  #  Environment detection.
  #
  # Author : Arvin
  # Date   : 15/09/2017
  #--------------------------------------
  
  #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) <--> I2C(1)
  #SDA <--> X10
  #SCL <--> X9
  #VCC
  #GND
  #ADO(ADDR/address) <--> None
  #Command list:
  #0x00 power off
  #0x01	power on
  #0x07	reset
  #0x10	Continuously H-Resolution Mode, 1lx resolution, measurement time is typically 120ms
  #0x11	0.5lx, 120ms
  #0x13	4lx, 16ms
  
  from pyb import I2C
  
  i2c = I2C(1, I2C.MASTER)             # create and init as a master
  
  i2c.send(0x10, 0x23)        # send 3 bytes to slave with address 0x23
  
  i2c.is_ready(0x23)           # check if slave 0x23 is ready
  i2c.scan()                   # scan for slaves on the bus, returning
  
  i2c.mem_read(3, 0x23, 2)     # read 3 bytes from memory of slave 0x23,
                               #   starting at address 2 in the slave
  
  
subject: Update env_detect.py