new_contents: #!/usr/bin/python
  # Example using a character LCD connected to a Raspberry Pi or BeagleBone Black.
  import math
  import time
  
  import Adafruit_CharLCD as LCD
  
  
  # Raspberry Pi pin configuration:
  lcd_rs        = 27  # Note this might need to be changed to 21 for older revision Pi's.
  lcd_en        = 22
  lcd_d4        = 25
  lcd_d5        = 24
  lcd_d6        = 23
  lcd_d7        = 18
  lcd_backlight = 4
  
  # BeagleBone Black configuration:
  # lcd_rs        = 'P9_8'
  # lcd_en        = 'P9_10'
  # lcd_d4        = 'P9_18'
  # lcd_d5        = 'P9_16'
  # lcd_d6        = 'P9_14'
  # lcd_d7        = 'P9_12'
  # lcd_backlight = 'P9_7'
  
  # Define LCD column and row size for 16x2 LCD.
  lcd_columns = 16
  lcd_rows    = 2
  
  # Alternatively specify a 20x4 LCD.
  # lcd_columns = 20
  # lcd_rows    = 4
  
  # 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)
  
  # Print a two line message
  lcd.message('Hello\nworld!')
  
  # Wait 5 seconds
  time.sleep(5.0)
  
  # Demo showing the cursor.
  lcd.clear()
  lcd.show_cursor(True)
  lcd.message('Show cursor')
  
  time.sleep(5.0)
  
  # Demo showing the blinking cursor.
  lcd.clear()
  lcd.blink(True)
  lcd.message('Blink cursor')
  
  time.sleep(5.0)
  
  # Stop blinking and showing cursor.
  lcd.show_cursor(False)
  lcd.blink(False)
  
  # Demo scrolling message right/left.
  lcd.clear()
  message = 'Scroll'
  lcd.message(message)
  for i in range(lcd_columns-len(message)):
  	time.sleep(0.5)
  	lcd.move_right()
  for i in range(lcd_columns-len(message)):
  	time.sleep(0.5)
  	lcd.move_left()
  
  # Demo turning backlight off and on.
  lcd.clear()
  lcd.message('Flash backlight\nin 5 seconds...')
  time.sleep(5.0)
  # Turn backlight off.
  lcd.set_backlight(0)
  time.sleep(2.0)
  # Change message.
  lcd.clear()
  lcd.message('Goodbye!')
  # Turn backlight on.
  lcd.set_backlight(1)
  
subject: Add basic char LCD example.