BioSensor/sensor.py at master · lrj509/BioSensor · GitHub

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#Import python modules
import tsl2591
import Adafruit_CharLCD as LCD


class sensor():

    """
    This class encapsulates all of the sensor functions for easy use.

    @author Amy, Adam, Luke
    """


    def get_sensor_value(self):

        """

        Gets the digital sensor value

        """

        tsl = tsl2591.Tsl2591()  # initialize
        full, ir = tsl.get_full_luminosity()  # read raw values (full spectrum and ir spectrum)
        lux = tsl.calculate_lux(full, ir)  # convert raw values to lux
        print ('Lux:', lux)
        digital = round(lux,1)
        return(digital)

        return(1.0)


    def LCD(self, time_to_sleep): #LCD screen

        """
        This method displays the lux value on the LCD output display

        """

        # Raspberry Pi pin configuration:
        lcd_rs        = 7  # Note this might need to be changed to 21 for older revision Pi's.
        lcd_en        = 8
        lcd_d4        = 25
        lcd_d5        = 24
        lcd_d6        = 23
        lcd_d7        = 18
        lcd_backlight = 4


        # Define LCD column and row size for 16x2 LCD.
        lcd_columns = 16
        lcd_rows    = 2

        # Initialize the LCD using the pins above.
        lcd = LCD.Adafruit_CharLCD(lcd_rs, lcd_en, lcd_d4, lcd_d5, lcd_d6, lcd_d7,
                                   lcd_columns, lcd_rows, lcd_backlight)


        #The message to be displayed on the lcd
        display_message = 'Lux:' + str(self.get_sensor_value())

        #clears the screen
        lcd.clear()

        # display a two line message
        lcd.message(display_message)
        #Displays output for time_to_sleep seconds and then clears message


        return