1  """Simple test for 16x2 character lcd connected to an MCP23008 I2C LCD backpack."""
 2  import time
 3  import board
 4  import busio
 5  import adafruit_character_lcd.character_lcd_i2c as character_lcd
 6  
 7  # Modify this if you have a different sized Character LCD
 8  lcd_columns = 16
 9  lcd_rows = 2
10  
11  # Initialise I2C bus.
12  i2c = busio.I2C(board.SCL, board.SDA)
13  
14  # Initialise the lcd class
15  lcd = character_lcd.Character_LCD_I2C(i2c, lcd_columns, lcd_rows)
16  
17  # Turn backlight on
18  lcd.backlight = True
19  # Print a two line message
20  lcd.message = "Hello\nCircuitPython"
21  # Wait 5s
22  time.sleep(5)
23  lcd.clear()
24  # Print two line message right to left
25  lcd.text_direction = lcd.RIGHT_TO_LEFT
26  lcd.message = "Hello\nCircuitPython"
27  # Wait 5s
28  time.sleep(5)
29  # Return text direction to left to right
30  lcd.text_direction = lcd.LEFT_TO_RIGHT
31  # Display cursor
32  lcd.clear()
33  lcd.cursor = True
34  lcd.message = "Cursor! "
35  # Wait 5s
36  time.sleep(5)
37  # Display blinking cursor
38  lcd.clear()
39  lcd.blink = True
40  lcd.message = "Blinky Cursor!"
41  # Wait 5s
42  time.sleep(5)
43  lcd.blink = False
44  lcd.clear()
45  # Create message to scroll
46  scroll_msg = "<-- Scroll"
47  lcd.message = scroll_msg
48  # Scroll message to the left
49  for i in range(len(scroll_msg)):
50      time.sleep(0.5)
51      lcd.move_left()
52  lcd.clear()
53  lcd.message = "Going to sleep\nCya later!"
54  time.sleep(5)
55  # Turn backlight off
56  lcd.backlight = False
57  time.sleep(2)